Develop Bugs

AT&T 3G data network on the T-Mobile G2

Hello everyone, this is my first thread so please be gentle!
I currently have a G1, and hope to put it to rest very soon, and get the new G2!
(staying true to the "G")
I use an AT&T sim card on my current G1.
I have been lurking (for quite some time now) on these forums trying to find an answer to using the AT&T Sim Card on the G2. I have yet to find my answer through searching.
The capabilities I'm looking for to use on a G2 with an AT&T sim card include:
at least 3G network data speeds
normal use of calling
(I live in the US, and I don't know if that allows me to have 3G instead of EDGE)
Some things I have found:
In one other forum it said the AT&T would work on the G2, however it would only work on the EDGE network. (which I believe is 2G? please clarify if you can)
"
TMO's 3G network runs on the 1700Mhz spectrum.
AT&T's 3G network runs on the 850 and 1900Mhz spectrum.
The G2 is incapable of operating on AT&T's 3G network but will work just fine on the EDGE network.
"
the "[Guide] Subsidy Unlock, SuperCID, and Radio S-OFF" presents a sim unlock, so would that mean I could use the 3G data networks on AT&T? and have local calling? or is that something else?
Thanks in advance!

The Subsidy Unlock would allow the use of the AT&T sim card. I'm quite sure you wouldn't get the 3G+ speeds. Edge only, just like the G1.

ALB24 said:
T-Mobile HTC G2. rage+gfree worked great. Tested on both TMO & AT&T Networks and everything worked with no problems. Went from getting no radio signal due to Code unlock method, to getting any network I choose.
Click to expand...
Click to collapse
That was from someone in the sim unlock thread. Not sure if any network chosen means 2g/3g but I would think 3g would be supported.
Sent from my T-Mobile G2 using XDA App

It isn't just your phone, I don't think any phones ever come out with the correct bands for ATT and Tmobile...Even the N1 which is supposed to be a world phone was only EDGE on ATT

The T-Mobile G2 will not work with 3G on AT&T (as you stated in the original post, the 3G or UMTS bands are different). It will instead use the regular GSM bands for 2G data.
If you want a Desire Z that works on AT&T's 3G, you have to get the NAM version offered by Bell Canada (check out the Desire Z forums). Once unlocked, it'll work fine on AT&T's 3G network.

Durkbeef said:
It isn't just your phone, I don't think any phones ever come out with the correct bands for ATT and Tmobile...Even the N1 which is supposed to be a world phone was only EDGE on ATT
Click to expand...
Click to collapse
Actually, Nokia's latest smartphones are pentaband - they can use 3G on AT&T, T-Mobile, and the European networks. This includes the C7, N8, and upcoming E7.
I have the N8 right now and have used it on both AT&T and T-Mobile with 3G.

ianmcquinn said:
The T-Mobile G2 will not work with 3G on AT&T (as you stated in the original post, the 3G or UMTS bands are different). It will instead use the regular GSM bands for 2G data.
If you want a Desire Z that works on AT&T's 3G, you have to get the NAM version offered by Bell Canada (check out the Desire Z forums). Once unlocked, it'll work fine on AT&T's 3G network.
Click to expand...
Click to collapse
Ah this was extremely helpful!
Thank you all for the help as well.

This is where I got my Desire Z: http://negrielectronics.com/htc-desire-z-850-1900-3g-unlocked.html
I didn't believe it and was scared that I'd open the box and see the wrong bands but sure enough, it works. Brandon from pocketnow.com did a review on it as well with that specific device.
Let me know if you need/want screenshots for proof

slyydrr said:
This is where I got my Desire Z:
I didn't believe it and was scared that I'd open the box and see the wrong bands but sure enough, it works. Brandon from pocketnow.com did a review on it as well with that specific device.
Let me know if you need/want screenshots for proof
Click to expand...
Click to collapse
Ah proof/screenshots for AT&T 3G working on the HTC Desire Z? Sure that would be great! Thanks for your time!
I'm probably going to go for this phone then!

Here are a couple for you! Let me know if you want more. I tried taking pictures with another phone (I still have my N1) but it wasn't very clear.
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Check the baseband in my screenshot against the basebands in the dev section if you'd like. They should match up

Ah! Beautiful!!
Thank you so much I think that's proof enough! haha.
I'll definitely be getting this phone!
I searched forever for an answer, and this surely is the answer.
Finally will be putting my G1 to rest haha

You betcha! For what it's worth, this is how I found out.
http://pocketnow.com/android/htc-desire-z-with-att-3g-software-review-video
Also, try these coupon codes! $35 off orders over $400: sb35offjkh $35 off desire phones over $500: desire0430

I have a NAM Unbranded/Unlocked version that I am using on AT&T as well. I purchased mine on Ebay, it was a little cheaper than buying it through Negri (which also didn't have any when I purchased mine)
Definitely works on 3G AND can be used with a 'dumb-phone' data plan ($10/month unlimited) =D

gbarayah said:
I have a NAM Unbranded/Unlocked version that I am using on AT&T as well. I purchased mine on Ebay, it was a little cheaper than buying it through Negri (which also didn't have any when I purchased mine)
Definitely works on 3G AND can be used with a 'dumb-phone' data plan ($10/month unlimited) =D
Click to expand...
Click to collapse
How do you get the $10/mo data plan? I don't have that option!

Yeah I know this is going a little off topic (sorry mods)
but I think he's talking about individual unlimited data plan for "basic" phones?
I kept trying to pester AT&T about it.
So is it true you don't need the DataPro plan in order to acheive 3G data networks with smartphones?
And you can use the "basic" unlimited data plan for cheaper for the same 3G networks?
The AT&T reps kept saying otherwise.
Thanks again all for the replies!

slyydrr said:
How do you get the $10/mo data plan? I don't have that option!
Click to expand...
Click to collapse
I have a family plan with an Iphone line (sister). My phone (originally a BB when contract signed) and 2 Dumbphones (parents)
What I did was, take my SIM card, and put it into one of the dumbphones. Went into ATT and had them add unlimited Data to that line at the $10 option. (And cancel the BB services since I wasn't using the phone anymore - told them I sold it on CL) Went home and returned the SIM into my BB and I was all set to go with unlimited Data. The only thing that didn't work with the BB was the push Email services...
If you go to your online account with ATT it will show you an image of the device you are using with service and although it showed my device as a BB at the time, (after returning the SIM to the BB) the $10 plan continued to work without any hitches.
Now that I have a phone that is unbranded with an IMEI # that ATT doesn't recognize, they don't have an image for my phone, so they have no way to detect that I am using a smartphone.
I have used the $10 plan with many devices: BB, Touch Pro, Nokia E71, etc and have never had any problems.
htcdreamer said:
Yeah I know this is going a little off topic (sorry mods)
but I think he's talking about individual unlimited data plan for "basic" phones?
I kept trying to pester AT&T about it.
So is it true you don't need the DataPro plan in order to acheive 3G data networks with smartphones?
And you can use the "basic" unlimited data plan for cheaper for the same 3G networks?
The AT&T reps kept saying otherwise.
Thanks again all for the replies!
Click to expand...
Click to collapse
Yes that is the plan that I am referring to and yes the reps are full of crap. ATT wants to charge you more for having a 'smartphone' even though you use the exact same data, frequencies, and service as other users. There are many ways around this, but going into an AT&T store and trying to 'reason' with them is not one. I suggest the method I used with a dumbphone. Alternatively, you can do the same process online through account manager without having to deal with a live person.

Side question here. I'm thinking about giving the G2 to a friend on AT&T. The thing is that he doesn't want to pay for a data plan. Will AT&T force a data plan onto the line? Also un checking data enabled, will that stop all data over the cellular network so he doesnt get charged at all?

mayurolla said:
Side question here. I'm thinking about giving the G2 to a friend on AT&T. The thing is that he doesn't want to pay for a data plan. Will AT&T force a data plan onto the line? Also un checking data enabled, will that stop all data over the cellular network so he doesnt get charged at all?
Click to expand...
Click to collapse
I don't think they can force a data plan as the phone is not being subsidized by ATT because of a contract.
In theory disabling data will stop all data but in reality he will probably still use a bit of it. Search the forums as I remember another user having the issue of zero data use.
Sent from my HTC Vision using XDA App

I finally did the whole unlock, super CID thing using gfree and adb.
Just want to make that no one has found a way to get 3G speeds on the G2?
Or is EDGE my only choice? I understand the whole band thing as well.

No. From what I've gathered on the g2 being on at&t, its impossible as the radio hardware is different and will not pick up the 3g bands. Flashing a different radio to match up the bands won't work, either (it will possibly brick your phone, actually.)
Go with the NAM Desire Z from bell canada. Its your best bet.
Sent from my HTC Vision running GingerVillain 1.4

[Q] Buying SM-P605 Advice

Hi Guys
Just looking for some advice regarding the SM-P605, the 4G LTE version. I am based in the UK and have not been able to find a reasonably priced tablet with 4G.
I went to the Samsung store in Oxford Street and it was £600, which is over my budget. I have recently seen a version on Amazon for just £429.99, which I was tempted to get. The model number is listed as SM-P6050ZKADBT, which doesn't seem to be a UK version.
I thought I had read somewhere that buying an LTE device from abroad would mean that in the UK you would not get the true speed from 4G, but cannot find that article anywhere anymore. The seller also responded to ask where I heard it from as there is no difference between UK LTE and International LTE.
Does anyone know if it is OK to buy an international SM-P605 for use on the EE network in the UK please? I have searched on these forums also and could not find a definitive answer.
Thanks

hi2shy said:
Hi Guys
Just looking for some advice regarding the SM-P605, the 4G LTE version. I am based in the UK and have not been able to find a reasonably priced tablet with 4G.
I went to the Samsung store in Oxford Street and it was £600, which is over my budget. I have recently seen a version on Amazon for just £429.99, which I was tempted to get. The model number is listed as SM-P6050ZKADBT, which doesn't seem to be a UK version.
I thought I had read somewhere that buying an LTE device from abroad would mean that in the UK you would not get the true speed from 4G, but cannot find that article anywhere anymore. The seller also responded to ask where I heard it from as there is no difference between UK LTE and International LTE.
Does anyone know if it is OK to buy an international SM-P605 for use on the EE network in the UK please? I have searched on these forums also and could not find a definitive answer.
Thanks
Click to expand...
Click to collapse
I have a SM-P605 and I imported it from T-Dimension in HK, it cost with all fees & taxes ~£465.
I then downloaded what was meant to be a BTU firmware for it and flashed it and it didn't trip KNOX , but rather unfortunately it installed itself as a Spanish one (PHE) instead.
Now whilst it's not the end of the world having a SM-P605 with a CSC code of PHE, I would rather it were BTU & no matter where I look I cannot find a stock SM-P605 firmware that will do it.
I've installed a 3 sim card into mine and it works perfectly, I've not bought one that gives me 4G/LTE access because it's pretty c**p coverage at the moment, so I don't feel that there's any significant advantage of paying extra for something that I can't get or rarely get.
Still at the end of the day I have a SM-P605 which works well, will shortly have a 128Gb SDXC card installed into it as well. But TBQH, I'm not overly impressed with the service that Samsung provides in regards to firmware updates for its devices so I'm considering moving to the "Dark Side" and getting an Ipad & Iphone instead.
Consider your purchase carefully, especially as Samsung have new devices out, which have now superseded the 10.1 2014 edition, as I severely doubt that Samsung will continue to support &/or issue firmware updates for it much longer, if all if their reputation is anything to go by.

Hi
I have just managed to find this quote also, which kind of backs up what you say
"The version advertised here is the SM-P605 P605XXUBMJ4 Android 4.3 variant which has the Quad-core 2.3 GHz CPU, 32 GB built-in memory and support for LTE bands 800, 850, 900, 1800, 2100, 2600. It should in theory work with all current UK 4G carriers.
HOWEVER, the latest radio firmware update available in the UK doesn't appear to support LTE. When I went to "Settings...More networks...Mobile networks...Network mode", expecting to see an LTE connection mode, all I could see was GSM/WCDMA (i.e. "H+"). The best mobile connection speed I've managed so far on a 3 Mobile PAYG mobile broadband subscription is "H+" at around 5Mbps. By way of comparison, I get solid "4G" connectivity with the same carrier on my Samsung Galaxy S4 Mini, so I don't think it's a 3 Mobile problem."
I have a 4G sim card with 3GB data allowance per month, so I am keen to use it to it's full potential, so with that in mind, I think I will give this tablet a miss. Thanks for your advice and sharing your experience.

hi2shy said:
Hi
I have just managed to find this quote also, which kind of backs up what you say
"The version advertised here is the SM-P605 P605XXUBMJ4 Android 4.3 variant which has the Quad-core 2.3 GHz CPU, 32 GB built-in memory and support for LTE bands 800, 850, 900, 1800, 2100, 2600. It should in theory work with all current UK 4G carriers.
HOWEVER, the latest radio firmware update available in the UK doesn't appear to support LTE. When I went to "Settings...More networks...Mobile networks...Network mode", expecting to see an LTE connection mode, all I could see was GSM/WCDMA (i.e. "H+"). The best mobile connection speed I've managed so far on a 3 Mobile PAYG mobile broadband subscription is "H+" at around 5Mbps. By way of comparison, I get solid "4G" connectivity with the same carrier on my Samsung Galaxy S4 Mini, so I don't think it's a 3 Mobile problem."
I have a 4G sim card with 3GB data allowance per month, so I am keen to use it to it's full potential, so with that in mind, I think I will give this tablet a miss. Thanks for your advice and sharing your experience.
Click to expand...
Click to collapse
You need to get a 4G specific SIM to get it to work, a standard mobile internet SIM won't cut it. You'll need to pay the extra to get the 4G functionality.
The 4G bit isn't worth it at the moment because the coverage isn't up to much as yet & still in its infancy, but in years time it might be better & worthwhile.

Skinhead1967 said:
You need to get a 4G specific SIM to get it to work, a standard mobile internet SIM won't cut it. You'll need to pay the extra to get the 4G functionality.
The 4G bit isn't worth it at the moment because the coverage isn't up to much as yet & still in its infancy, but in years time it might be better & worthwhile.
Click to expand...
Click to collapse
think he said he had 4g on his sim, the problem for us UK users is basically we are going to have to root the device to enable it, certainly until our providers get their finger out, which could be whenever. The way I looked at it was 'am I going to sell the tablet in the next 2 years?' if not, just root and have the benefits 6 months before they roll it out here. Samsung always been slow with updating, but then that's why people choose android, it isn't for the official stuff, it's for all the customisation you CAN do. Chomping at the bit for mine, it's an import so it's never going to be a flyer for a resale, so may as well enjoy it the next couple of years.

EvilTongs said:
think he said he had 4g on his sim, the problem for us UK users is basically we are going to have to root the device to enable it, certainly until our providers get their finger out, which could be whenever. The way I looked at it was 'am I going to sell the tablet in the next 2 years?' if not, just root and have the benefits 6 months before they roll it out here. Samsung always been slow with updating, but then that's why people choose android, it isn't for the official stuff, it's for all the customisation you CAN do. Chomping at the bit for mine, it's an import so it's never going to be a flyer for a resale, so may as well enjoy it the next couple of years.
Click to expand...
Click to collapse
My 605 came from HK (T-Dimension), so like your it's an import, so it will work with the 4G networks here when they become fully operational, I'm not going to pay for 4G when the UK's 4G coverage is so poor at the moment.
When the 4G network becomes more established throughout the UK and in the area where I live then I may consider it, but I have a tablet that's 4G/LTE enabled for the future, however with me being so unimpressed & underwhelmed by Samsung's poor upgrade policy, I may consider buying both an Iphone & Ipad.

I don't live in the UK but in Australia. I bought a HK P605 and it works with 4G... As Oz uses international modems and radios too, it should work on yours.

Skinhead1967 said:
Now whilst it's not the end of the world having a SM-P605 with a CSC code of PHE, I would rather it were BTU & no matter where I look I cannot find a stock SM-P605 firmware that will do it.
Click to expand...
Click to collapse
Installing another region's s/w doesn't change your CSC. When connecting to Play or Samsung Apps it still identifies as being from Hong Kong and any regional restrictions still apply. Plug it in to Kies and it'll come up as Hong Kong.

BarryH_GEG said:
Installing another region's s/w doesn't change your CSC. When connecting to Play or Samsung Apps it still identifies as being from Hong Kong and any regional restrictions still apply. Plug it in to Kies and it'll come up as Hong Kong.
Click to expand...
Click to collapse
You are wrong.
I have a HK machine, which I flashed with a "BTU" firmware and I've connected it to Kies3 and it tells me my CSC code is now PHE (Spain) and checking with the device it says PHE as well.
So as far as I am concerned the machine is now an EU one. Not an HK one.
And I still wont recommend buying one either.

When you use Kies for emergency recovery you input the device serial number. From that, Kies knows the CSC the device shipped with and the regional ROM it should be running. Of course Samsung has access to the same information. I'm running a TPA 4.4 ROM but as you can see below my CSC is still TTT. So I have no idea what happened in your situation but you'll forever have a HK device based on its serial number. I'd say it would affect your warranty but you don't have one any way.
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BarryH_GEG said:
When you use Kies for emergency recovery you input the device serial number. From that, Kies knows the CSC the device shipped with and the regional ROM it should be running. Of course Samsung has access to the same information. I'm running a TPA 4.4 ROM but as you can see below my CSC is still TTT. So I have no idea what happened in your situation but you'll forever have a HK device based on its serial number. I'd say it would affect your warranty but you don't have one any way.
Click to expand...
Click to collapse
Yes I know that and where you have TTT, I now have PHE.

Just an update, my 605 arrived today all the way from HK (took 8 days from ordering to arrival!). Everything working exactly as it should, on connecting to wifi it's already asking me to update to 'fix stability issues'. For now I've disabled it updating, not actually sure what it wants to update! To KitKat? It's my first tablet, so I'm leaving at stock for a week or so to get the general gist of it. Makes it easier that I have had an S3 for near 2 years now and it seems almost everything (menus etc) are almost identical. Put my phone sim into the note and it works no problem, I'm not on 4G at the minute mainly because it's expensive, I live in Birmingham so the 4G coverage here is excellent. Looking forward to reading up on rooting and trying out some mods, stocky's looks a good one, but I'm open to any suggestions if anyone has any Very happy with my £353 purchase, it's the 32GB version too. Seems plenty fast for me not being that experienced using a tablet. Fully expecting the same model when released in uk will easy be 600 maybe more, or more likely tied to a mad 24 month 4G contract 60+ a month plus 100 quid upfront.

Simultaneous Voice and Data?

Received my note 4 yesterday, noticed today while I was on a call that I could not connect to LTE data simultaneously as I was used to doing on my note 3. This led me to inquire why this was the case, after searching the web I found that to the best of my understanding that the new sprint phones are all coming with one chip to access a cell signal instead of two like my note 3. If I've misspoke about the reason my apologies but I believe thats what I understood. Now I'm wandering if I was to use google voice to make calls could I then access data as well? This leads to another question, my understanding is that Sprint customers can allow google voice to use there current mobile number as there google voice number. If anyone has done this I would like to know if there are concerns to have and can you opt out if you no longer want to use the service? Any suggestions are appreciated.

Wow...this sucks! I just tested mine and i cant use data while making a fcuking call. Wtf sprint

danielddube said:
Wow...this sucks! I just tested mine and i cant use data while making a fcuking call. Wtf sprint
Click to expand...
Click to collapse
Like I said, I've never used Google voice for phone calls but that may be an option I'm just concerned about giving my phone number to google if I want to get it back.

todds67 said:
Like I said, I've never used Google voice for phone calls but that may be an option I'm just concerned about giving my phone number to google if I want to get it back.
Click to expand...
Click to collapse
you can always drop Google Voice from your number

Some are using hangouts. You can call and use WiFi for data if available, or you can do both call & data on WiFi.
For 95% its not an issue and Sprint is going VoIP in the near future and will be able to do both then.
The trade-off is better battery life with one antenna compared to having two.

Itchiee said:
Some are using hangouts. You can call and use WiFi for data if available, or you can do both call & data on WiFi.
For 95% its not an issue and Sprint is going VoIP in the near future and will be able to do both then.
The trade-off is better battery life with one antenna compared to having two.
Click to expand...
Click to collapse
So you can call out without wifi and use data, even with the Hangouts dialer?
Sent from my SGNote 3

So when I'm on 4g I won't be able to call someone using phone? Wtf, I can do that on my note 2...how the hell is this progress?

This is 100% Unsat!!!
I can't believe this has happened. I too need to know if this can be fixed by using Google Voice. You can keep your own number without giving it to GV, but this is completely a backward proposition.

U can only if you are on wifi or 4g while making call. Verizon and Sprint can not do data while on calls unless u are on 4g at the time or WiFi. Its the limitation of having CDMA devices. Att and tmobile doesnt have that issue

Hangouts essentially uses VoIP. Of course it will work. You're not actually making a cellular call with it.
All Sprint Spark LTE phones are incapable of using voice&data at the same time.

freeza said:
Hangouts essentially uses VoIP. Of course it will work. You're not actually making a cellular call with it.
All Sprint Spark LTE phones are incapable of using voice&data at the same time.
Click to expand...
Click to collapse
So the note 4 is a spark phone but the note 2 isn't?

New technology.. smh
I have the same problem with my LG G3. Cant surf the net while making calls. Its really a disappointment. Somehow Sprint needs to find a way to be able to have Spark and use data at the same dang time. My friend has the Note 4 as well and told me she could talk and use the net but I think she BS-n.

Blakestr said:
So the note 4 is a spark phone but the note 2 isn't?
Click to expand...
Click to collapse
That's correct.
Sent from my SGNote 3
---------- Post added at 11:06 AM ---------- Previous post was at 11:06 AM ----------
sosmooth757 said:
I have the same problem with my LG G3. Cant surf the net while making calls. Its really a disappointment. Somehow Sprint needs to find a way to be able to have Spark and use data at the same dang time. My friend has the Note 4 as well and told me she could talk and use the net but I think she BS-n.
Click to expand...
Click to collapse
She's lying ?
Sent from my SGNote 3

No Simo Voice/Data
With Sprink Spark, You can no longer have simo talk/text. It's a single signal. Instead of CDMA / GSM on LTE Devices. It is only allowing one. Now that isnt due to the phone. It's the towers and the tech they are using. I heard they are in the works to update that and there will eventually be a fix.
I work for Sprint.

neotremer said:
With Sprink Spark, You can no longer have simo talk/text. It's a single signal. Instead of CDMA / GSM on LTE Devices. It is only allowing one. Now that isnt due to the phone. It's the towers and the tech they are using. I heard they are in the works to update that and there will eventually be a fix.
I work for Sprint.
Click to expand...
Click to collapse
I think you meant "...simo talk/data"...

Are you telling me a bunch of sprint user's didn't know that spark phone's wasn't capable of talking and surfing the web at the same time using the phone data network lmao? Seriously why don't you guy's look up info before purchasing a phone first lmao this has been known since the first spark phone which was what i think the lg g2 if I'm not mistaken but no wait it's sprint fault for taking the direction they choose to better their network and services lol.

a little off
blacjac30 said:
U can only if you are on wifi or 4g while making call. Verizon and Sprint can not do data while on calls unless u are on 4g at the time or WiFi. Its the limitation of having CDMA devices. Att and tmobile doesnt have that issue
Click to expand...
Click to collapse
Most sprint phones dont have that capability, but yes the note 2, 3, and gs4 and 3 do . I have had them all and all work when on 4g and of course WIFI. It has nothing to do with the limitations of the CDMA network, its the hardware that they put in them. (as well) yes it is easier to do over GSM and they usually have that feature. though This is something that we should have been let known and also should have been worked out before putting (or lack thereof) something like taking those antennas out in play before getting the network right. Most of us cant use spark anyway! lol so now its no spark and you cant be on the phone and get 4g either, on the newest phones, G3, S5, Note 4 ETC....

neotremer said:
With Sprink Spark, You can no longer have simo talk/text. It's a single signal. Instead of CDMA / GSM on LTE Devices. It is only allowing one. Now that isnt due to the phone. It's the towers and the tech they are using. I heard they are in the works to update that and there will eventually be a fix.
I work for Sprint.
Click to expand...
Click to collapse
When you say eventually... Have they actually given some type of internal horizon or if it eventually like paying off the national debt?

Blakestr said:
When you say eventually... Have they actually given some type of internal horizon or if it eventually like paying off the national debt?
Click to expand...
Click to collapse
Lol nice. In for answer too
Sent from my Nexus 7 using Tapatalk

Why is both WiFi and LTE showing in my status bar when im on a WiFi connection? Yes, I do have download booster on, but it was doing this way before I enabled that for the first time.
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WiFi Calling and VoLTE and AT&T

It's my understanding that these features (advanced calling, like WiFi calling and VoLTE) Doo not work on unbranded devices like Pixel and others. This was the case with my unbranded SM935F or Galaxy S7 Edge until we got some files, an appropriate CSC, and also had AT&T switch our account to an IMEI of an AT&T branded device that had working WiFi Calling (others have apparently just called AT&T and had them provision WiFi Calling)
Note: for me, I have a business account so I could just go into my business portal and put in an IMEI that I got from an S7 Edge model in an AT&T store
I am attaching the files that we needed to add to our system to get WiFi calling to work on AT&T. I think I remember all I had to do was to add them and make sure permissions were correct
Here is an IMEI that I saw on another post that may work ..... But I do know that the AT&T system needs to recognize your phone IMEI as an att branded device that has working WiFi calling. So if you aren't business customers it will require a call to customer support.
Possible working IMEI:
Mod edit: Removed
Any Pixel AT&T users that could try this and report back would be greatly appreciated!
Btw, I'm not completely sure which files are needed in the Pixel as compared to the S7 Edge .... I would have a backup available
Here's link
https://drive.google.com/file/d/0B4qgtyu0rDEbU3dGNnhLZ0FXTWM/view?usp=drivesdk
File too late to upload here

You don't need any of that for WiFi calling or VoLTE. That all works fine on custom roms

spaceman860 said:
You don't need any of that for WiFi calling or VoLTE. That all works fine on custom roms
Click to expand...
Click to collapse
I obviously could be wrong ...... But I'm 99% sure that what you are saying is not true for AT&T and maybe even other USA carriers!
I KNOW that I'm right for S7 phones and ROMs .... And the problem is so pervasive that they have even been able to get unbranded S8's to obtain WiFi Calling on AT&T or other USA carriers (even though WiFi calling works great on branded S8 phones)
AT&T users a different mechanism to provision WiFi calling than other carriers

jcrompton said:
I obviously could be wrong ...... But I'm 99% sure that what you are saying is not true for AT&T and maybe even other USA carriers!
I KNOW that I'm right for S7 phones and ROMs .... And the problem is so pervasive that they have even been able to get unbranded S8's to obtain WiFi Calling on AT&T or other USA carriers (even though WiFi calling works great on branded S8 phones)
AT&T users a different mechanism to provision WiFi calling than other carriers
Click to expand...
Click to collapse
You are correct that AT&T does not allow unbranded phones to use those features. It's all BS too. I have great LTE coverage but many times I will go to make a call and have crap service because they have canabalized a lot of the hsdpa towers for LTE. Then the switch back to LTE can take forever. And I don't care what they or anyone says AT&T's hspa+ is no where near as fast

None of this works, as AT&T blocks access to VoLTE on Pixel phones. Denies me the use of Numbersync for my tablet and android wear 2.0 watches. AT&T service techs keep promising to fix it and try to force it to work, but still blocked. It is simply a situation for Google to get the Pixel certified for the AT&T network, which is problematic, as AT&T uses a non-standard protocol for HD Voice that is unique to their network. So, as best I can tell, AT&T has to release the source code, for a price, I presume, to Google to add to the phones and then pay for the certification process with the FCC. Seems a stand-off as long as Google has an "exclusive" arrangement with Verizon. So for me, I'm pissed not to have numbersync for my devices, but unwilling to give up all the advantages of the Pixel phone.

That's why I switched to T-Mobile.

So there is no way to get VoLTE on the Pixel XL with AT&T then?
Sent from my Pixel XL using Tapatalk

chipstien said:
So there is no way to get VoLTE on the Pixel XL with AT&T then?
Sent from my Pixel XL using Tapatalk
Click to expand...
Click to collapse
Not currently

If AT&T carries the upcoming Pixel 2, is it possible Numbersync would start working on Pixel 1 devices?

jkimrey said:
If AT&T carries the upcoming Pixel 2, is it possible Numbersync would start working on Pixel 1 devices?
Click to expand...
Click to collapse
I doubt it. They only support advanced features on devices sold by them so it's not as if older Pixels will suddenly be grandfathered in just because they start carrying newer ones.

This annoys me to no end... If I buy a phone from att, do they have to give me an unlock code when the phone is paid off? I really need WiFi calling for a trip I make multiple times a year
Sent from my Pixel XL using Tapatalk

murso74 said:
This annoys me to no end... If I buy a phone from att, do they have to give me an unlock code when the phone is paid off? I really need WiFi calling for a trip I make multiple times a year
Sent from my Pixel XL using Tapatalk
Click to expand...
Click to collapse
I was able to get the code the same day or next for the att Note 8 that was bought from Samsung. The device is paid off.

muzzy996 said:
I doubt it. They only support advanced features on devices sold by them so it's not as if older Pixels will suddenly be grandfathered in just because they start carrying newer ones.
Click to expand...
Click to collapse
Yeah according to a rep I spoke with, the pixel 2 will support Numbersync even though att isn't selling them. There are, however, no plans to change the restriction on the original pixels.

I'm in the same boat but I'm genuinely curious - if I don't need wifi calling - is it really a big deal not having VoLTE? I'm taking in terms of better signal or faster LTE internet speed. Or does VoLTE is just having clearer phone calls? I guess what I'm asking is what other benefits are we losing (on a technical standpoint)

keplenk said:
I'm in the same boat but I'm genuinely curious - if I don't need wifi calling - is it really a big deal not having VoLTE? I'm taking in terms of better signal or faster LTE internet speed. Or does VoLTE is just having clearer phone calls? I guess what I'm asking is what other benefits are we losing (on a technical standpoint)
Click to expand...
Click to collapse
Late response but as far as AT&T goes besides VoLTE what I experienced on my Pixel XL was random issues with group text (MMS) reception from certain individuals from other carriers.
In particular it seemed as though if senders of MMS texts to a group chat that I was participating in sent a text from a carrier like T-Mobile and they were using Samsung devices with VoLTE and enhanced LTE stuff enabled on their end I'd not receive the text. I would instead receive texts from others in the conversation. I could freely text any of the same individuals in a separate standard SMS conversation just fine, and they could send me an MMS text like a photo, but as soon as we were in group MMS I'd lose the ability to receive their texts and no amount of APN changes or combinations of texting apps would fix it.
I can't tell you how many times over the course of the first 5 months of owning my Pixel XL with an AT&T SIM in it I missed out on half the conversation in group MMS. Doing nothing to my phone other than porting number to T-Mobile and putting in my new T-Mobile SIM all of my group MMS issues went away (replaced with ****ty signal LOL but that's a different story). I'm now on Verizon with my XL and am a happy camper, albeit poorer having wasted money jumping around.

All U.S. V30/V3O+/V30S will need stock firmware, not LOS-based custom ROMs. When?

All U.S. V30/V3O+/V30S will need stock firmware, not LOS-based custom ROMs. When?
3G CDMA and HSPA is going away. U.S. users will NEED VoLTE and/or Wi-Fi calling for carrier phone calls. V30 LOS-based ROMs do not have that and will never have that.
By "all", I mean customers of U.S. carriers Verizon, T-mobile (& Sprint), AT&T -- and all MVNOs (Straight Talk, Ting, etc) using those major carriers. There are some regional carriers (not MVNOs) who have their own towers and FCC bandwidth licenses, i.e. parts of Appalachia, upper Michigan peninsula, remote areas of Texas, parts of Alaska, for which this timetable ostensibly seems not to apply. BUT IT DOES. All these regional carriers have roaming agreements with at least one of the major national carriers for when their customers travel outside their isolated regional towers coverage. If you can't make phone calls in another state or even another part of your state, what good is roaming?
No, this doesn't affect people outside the U.S., unless they come to visit U.S. (tourist, work, school).
In 6 months, you will not be able to use LOS-based custom ROMs with V30 on Verizon or T-mobile and T-mobile owned Sprint (that brand is going away).
In 18 months, you will not be able to use LOS-based custom ROMs with V30 on AT&T.
* As of December 31, 2020 Verizon is dropping 3G CDMA to repurpose bandwidth for 5G.
After that date, to make any phone calls on Verizon you will need Verizon VoLTE/Wi-Fi Calling. No V30 LOS-based custom ROMs have carrier VoLTE/Wi-Fi calling or will ever have those features. You will need stock Verizon firmware and an account with VoLTE enabled by Verizon. It can be rooted stock firmware; you can use Magisk modules to add custom ROM type features -- but it needs to be on Verizon firmware for VoLTE. Verizon calls it "HD Calling". That feature has to be enabled on a Verizon IMEI phone. People who have it enabled in their Verizon account can then use any North American variant flashed to Verizon VS996 (even rooted) firmware. Some people use older Verizon phones to enable the "HD Calling" (VoLTE) feature then switch SIM card to their non-Verizon V30 (like LS998 V30+ converted to VS996). Another workaround is to use a Verizon MVNO like Total Wireless which gives you "Enhanced 4G LTE Mode" (a.k.a. VoLTE) while using Verizon towers. You don't need Verizon's permission. However, if you have native Verizon VS996, you don't have to worry about such workarounds.
* T-mobile users are in the same predicament, almost same timeline.
In January 2021, T-mobile will be dropping 3G HSPA for same reasons. At that date, T-mobile users will need VoLTE or Wi-Fi Calling to make carrier phones calls. Those features only come with V30 stock firmware (or stock-based ROMs). However, T-mobile is less stingy than Verizon. They also allow V30 phones with US998 firmware to have VoLTE/Wi-Fi calling with T-mobile SIM. Whereas Verizon not only requires Verizon stock firmware, VoLTE needs to have been activated on a phone with Verizon IMEI at some point.
* AT&T will also eventually drop 3G HSPA -- but not until February 2022 (18 months from now).
So, for U.S. V30 owners who wish to run V30 LOS custom ROMs a little longer, you should check out AT&T Prepaid. It's a lot cheaper than "regular" AT&T (Postpaid, a.k.a. contract AT&T), but AT&T Prepaid is only for people who own their phones (not financed). It you own your phone outright, it's a GREAT deal! AT&T Prepaid uses same AT&T servers as AT&T Postpaid. On the 8GB plan I am not throttled whatsoever (70 Mbps - 90 Mbps)and have very low pings (low lag). See plan rates at that link.
Right now, AT&T (Prepaid and Postpaid) still allows you to Bring Your Own Phone. I have three US998 on AT&T; two of them are on AT&T Prepaid, one on AT&T Postpaid. And AT&T won't shut down 3G HSPA for another 18 months!
What happens when AT&T finally does shut down HSPA?
AT&T only gives VoLTE to AT&T IMEI phones, as well as iPhones and some other phones I would never own. Even though I'm a long-time AT&T customer, I've never used an AT&T branded phone on AT&T. I always buy carrier-unlocked Android flagship phones with specific checklist of features I want. I'm an AT&T customer with three native US998 V30/V30+ for myself, my wife, my mother -- so I'll cross that bridge when I come to it in February 2022. Will probably give my mother a AT&T V35. Maybe my wife, too. (V35 is basically a V40 in a V30 case; no notch.) Also, by 2022 LG may get their act together and produce a good phone for the LG V70 or LG V80. I may not own V30 by then. Or AT&T may decide to VoLTE whitelist US998 V30 like they whitelisted carrier-unlocked V35...
18 months is a long time. Anything can happen in 18 months!
To reiterate, any MVNOs (Straight Talk, Ting, etc.) which use Verizon, T-mobile/Sprint, and AT&T will also be affected by these upcoming 3G shutdown/VoLTE required decisions.
_________
When the deadline does hit -- like for Verizon or T-mobile and you need to stay on that carrier for some reason -- you can flash back to stock firmware via KDZ with Dev Patched LGUP or via TWRP-flashable zips (stock ROMs) located in the V30 Development section.
Again, if you don't want to do this in the next six months (you still want to run V30 LOS-based ROMs), and you don't NEED Verizon or T-mobile (Sprint), simply switch to AT&T Prepaid and you can postpone until February 2022! Yes, you could also use an AT&T MVNO, but I'm not a fan of most AT&T MVNOs. Most MVNOs throttle to low speeds (like Cricket) and/or have high pings (lag). The only exception I'm aware of is Red Pocket MNVO, which is actually pretty good. Just make sure you choose their "GSMA" (AT&T) SIM card -- since they have a choice of carrier towers. You want AT&T to be the underlying provider, to keep 3G HPSA as long as possible.
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_______
Yes, XDA News had a write up of this couple of days ago. See link below. But it was more general -- focusing on what phones you needed to have for each U.S. carrier's VoLTE. This post is more specific -- about not being able to use LOS-based custom ROMs on any LG V30 variant phone when the deadline hits, and how to DELAY that deadline.
T-Mobile will require VoLTE for all phones starting January 2021, AT&T to follow suit in February 2022 – Here’s what that means for you
https://www.xda-developers.com/t-mobile-att-require-volte-phone-calls-shut-down-3g/

ChazzMatt said:
snip
Click to expand...
Click to collapse
Does this only effect the V30? Or is this every device running LOS?
Sent from my Samsung SM-T867U using XDA Labs

BROKEN1981 said:
Does this only effect the V30? Or is this every device running LOS?
Click to expand...
Click to collapse
This post is specific to LG V30 series as there is no VoLTE for LG V30 LOS-based custom ROMs.
LG in particular uses a borked version of IMS, which is hard for LOS-ROM devs to decode and implement. Allegedly it's easier other non-LG phones have LOS custom ROMs with VoLTE.
However, I have not kept up with how many other Android phones have LOS-based custom ROMs with VoLTE, and for which U.S. carriers.
Besides rooting becoming harder and harder with new phones, now users will have another thing to worry about -- whether or not they can even use LOS custom ROMs, to make carrier phone calls. I think the answer is going to be different even depending on carrier. AT&T has a VoLTE whitelist for example. Maybe it can be spoofed, maybe it can't.
But the days of buying a cheap Sprint LS998 128GB V30+ -- then Frankenstein converted to Open Market US998 or even AT&T H931 -- to use on AT&T network will end in February 2022. I don't need 5G, but at that point in time I will need access to VoLTE. (Even though I have Google Voice. My Google Voice Wi-Fi calling is spotty. I prefer to piggyback on my carrier phone number.)
Until now it's just been India Jio carrier users who absolutely needed VoLTE for custom ROMs on various phones. And with V30 they can't use LOS custom ROMs... That carrier launched in September 2016 with LTE only, with no legacy 2G or 3G bands. But in the near future (next 6 - 18 months), it will be all U.S. users, too.

I think this means it would be a good idea to resume research of how to get VOLTE working on non-stock phones. I'd love to see this happen as well. Maybe we resurrect the bounty on this opportunity (I recall we had one a while ago on the forums here?)

FWIW, I just checked in with my BIL (brother in-law) as he has a V30 that I converted to US998 for him, and he's using it on ATT. His phone is working with VOLTE and VOWIFI from what we can see (his 4G symbol stays white when he called me). I also saw the call was showing "HD" on my end (using the Google Phone app).
Granted, his old phone was purchased from ATT (one of the Samsung Galaxys) and we just swapped the SIM into the V30 without issue. In addition, his phone was originally H931, so the IMEI would work on ATT... but we didn't have to do anything special to get VOLTE/VOWIFI working on this phone. I don't know ATT myself, so I don't know if this is normal or not, but I wanted to mention it... particularly since we can't get H931 ROMs as a download...

schwinn8 said:
FWIW, I just checked in with my BIL (brother in-law) as he has a V30 that I converted to US998 for him, and he's using it on ATT. His phone is working with VOLTE and VOWIFI from what we can see (his 4G symbol stays white when he called me). I also saw the call was showing "HD" on my end (using the Google Phone app).
Granted, his old phone was purchased from ATT (one of the Samsung Galaxys) and we just swapped the SIM into the V30 without issue. In addition, his phone was originally H931, so the IMEI would work on ATT... but we didn't have to do anything special to get VOLTE/VOWIFI working on this phone. I don't know ATT myself, so I don't know if this is normal or not, but I wanted to mention it... particularly since we can't get H931 ROMs as a download...
Click to expand...
Click to collapse
I think the key here is it's still AT&T IMEI and he probably already had that feature enabled from a previous AT&T branded phone?
I have an AT&T V35 still on AT&T firmware and AT&T V35 which was converted to North American Open Market (NAO). Between the two, I'll get my wife and mother onto AT&T VOLTE. May have to give my wife the native one first, then switch her to the converted after we confirm. (This would emulate what your brother-in-law did.) Then pass the V35 with AT&T firmware on to my mother.
I have 18 months to pull that off.
Not sure what I'll do for myself... All North American V35 came only in 64GB. I want more storage than that, and not just microSD card.

Red Pocket is hard to beat: They offer plans on all four carriers (GSMA=AT&T, GSMT=TMO, CDMA=Verizon, CDMAS=Sprint) with VoLTE on all of them. Verizon plans require a Verizon branded phone, but other plans allow BYOD. It only has to be supported by the phone, no whitelisting.
I have GSMA (AT&T) and VoLTE works on US998 converted from LS998, tested on both 20h and 30b. Just open a chat with their support and ask them to enable VoLTE and VoWiFi (WiFi Calling), wait 15 mins, then reboot the phone.
US998 doesn't have VoLTE in the network menus on AT&T, but it works. It can be configured using Hidden Menu *#546368#*998# | Field Test | IMS Settings.
* IMS Settings | Test | Load Preset Config | Initialize Config to re-initialize VoLTE & VoWiFi.
* IMS Settings | GPRI VoLTE/VoWiFi | Registration | VoLTE | VoLTE indication to show VoLTE indicator in status bar (see attached screenshot)
Unfortunately US998 does NOT support AT&T WiFi Calling. Flashing the H931 TWRP flashable ROM brings support for both VoLTE and WiFi Calling, including menus to toggle it and statusline indicators. I tried it on my converted LS998, and it's a fairly nice ROM (even a few extra AT&T LTE bands). But unfortunately we don't have the latest Oreo version of it, let alone Pie.
Red Pocket GSMA is NOT throttled: I get 30Mbps inside our concrete block apartment with terrible reception and barely one bar. I am sure significantly faster anywhere with good reception. That said, I have no doubt that AT&T will give priority to their post-paid customers in case of congestion. Maybe to their pre-paid too, although I wouldn't be so sure.
My wife is on Red Pocket's $19 monthly Unlimited Talk/Text + 3GB LTE plan, which is a pretty great deal. Discounted annual and quarterly plans are available through the Red Pocket store on eBay. I am on their $60 annual ($5/mo) 100/100/500MB plan. I work from home so am on WiFi most of the time There is also a $240 ($20/mo) Unlimited Talk/Text + 5BG LTE plan. They have frequent deals on that store with even better prices for those willing to lock in 3 or 12 months. No taxes.
Edit: GSMT (T-Mobile) supposedly works even better on US998, since it supports VoLTE and WiFi Calling with network menu commands. I tried switching, but my super-cheap plan isn't available on GSMT. And my wife doesn't want to switch, as TMO has traditionally had the worst reception in our apartment -- although some of the best reception when out and about.
View attachment 5069803

TheDannemand said:
Red Pocket is hard to beat: They offer plans on all four carriers (GSMA=AT&T, GSMT=TMO, CDMA=Verizon, CDMAS=Sprint) with VoLTE on all of them. Verizon plans require a Verizon branded phone, but other plans allow BYOD. It only has to be supported by the phone, no whitelisting.
I have GSMA (AT&T) and VoLTE works on US998 converted from LS998, tested on both 20h and 30b. Just open a chat with their support and ask them to enable VoLTE and VoWiFi (WiFi Calling), wait 15 mins, then reboot the phone.
US998 doesn't have VoLTE in the network menus on AT&T, but it works. It can be configured using Hidden Menu *#546368#*998# | Field Test | IMS Settings.
* IMS Settings | Test | Load Preset Config | Initialize Config to re-initialize VoLTE & VoWiFi.
* IMS Settings | GPRI VoLTE/VoWiFi | Registration | VoLTE | VoLTE indication to show VoLTE indicator in status bar (see attached screenshot)
Unfortunately US998 does NOT support AT&T WiFi Calling. Flashing the H931 TWRP flashable ROM brings support for both VoLTE and WiFi Calling, including menus to toggle it and statusline indicators. I tried it on my converted LS998, and it's a fairly nice ROM (even a few extra AT&T LTE bands). But unfortunately we don't have the latest Oreo version of it, let alone Pie.
Red Pocket GSMA is NOT throttled: I get 30Mbps inside our concrete block apartment with terrible reception and barely one bar. I am sure significantly faster anywhere with good reception. That said, I have no doubt that AT&T will give priority to their post-paid customers in case of congestion. Maybe to their pre-paid too, although I wouldn't be so sure.
My wife is on Red Pocket's $19 monthly Unlimited Voice/Text + 3GB LTE, which is a pretty great deal. Discounted annual and quarterly plans are available through the Red Pocket store on eBay. I am on their $60 annual 100/100/500MB plan. I work from home so am on WiFi most of the time
Click to expand...
Click to collapse
I've heard good things about Red Pocket. That's why I attached screenshot of their plans, specifically the AT&T SIM card.
I think they must pay AT&T more money or something. Not only no throttling, but for some reason their SIM cards allow LG firmware updates on AT&T branded phones when even (AT&T owned) Cricket doesn't. Talked about over in the V35 forum last year with Pie update.

ChazzMatt said:
I've heard good things about Red Pocket. That's why I attached screenshot of their plans, specifically the AT&T SIM card.
I think they must pay AT&T more money or something. Not only no throttling, but for some reason their SIM cards allow LG firmware updates on AT&T branded phones when even (AT&T owned) Cricket doesn't. Talked about over in the V35 forum last year with Pie update.
Click to expand...
Click to collapse
Yes, I remember that discussion about AT&T updates on V35. Very surprising that Cricket owners wouldn't get them while Red Pocket would.
As it is now, it seems that GSMT (T-Mobile) is the most expensive for Red Pocket since several of their plans (including mine) are only available on the other carriers, but NOT on GSMT. On their eBay store, some plans come in two variants, with only the higher priced variant offering GSMT, but allotments otherwise the same. I guess T-Mobile is moving up in the world
Red Pocket Verizon plans also seem to be a steal for those who can use them, particularly in those rural areas where Verizon is the only game. Again, you need a Verizon branded phone. I don't know if you activate on one and move the SIM to a US998, if it will stay activated.

I just got my LOS set up how I like it and I was planning to leave it be for a long time... when I saw this thread and my heart sank . Fortunately, I'm on AT&T, so I have 18 months. By then, I may have upgraded to a new phone (or the thought of having to use stock firmware may push me to upgrade). Also, I won't be surprised if AT&T eventually pushes the deadline further down the road. Basically, it's not something that I'm going to worry about or even plan to do anything about. It's good to have it in the back of my head, though, since it'll affect me eventually, so thanks for the thread. I appreciate it being specific to the V30 because, if I had read the news elsewhere, I probably would've had questions about what it means exactly for my V30.

TheDannemand said:
Unfortunately US998 does NOT support AT&T WiFi Calling. Flashing the H931 TWRP flashable ROM brings support for both VoLTE and WiFi Calling, including menus to toggle it and statusline indicators. I tried it on my converted LS998, and it's a fairly nice ROM (even a few extra AT&T LTE bands). But unfortunately we don't have the latest Oreo version of it, let alone Pie.
Click to expand...
Click to collapse
Just to be clear, I'm not sure this statement is necessarily true. My BIL's phone is on ATT with US998, and I mentioned above that we did test VOWIFI and VOLTE and both worked. Full disclosure, this was an H931 IMEI, but the ROM is US998, and it works, so the "limitation" may just be another big-carrier-lie.

schwinn8 said:
Just to be clear, I'm not sure this statement is necessarily true. My BIL's phone is on ATT with US998, and I mentioned above that we did test VOWIFI and VOLTE and both worked. Full disclosure, this was an H931 IMEI, but the ROM is US998, and it works, so the "limitation" may just be another big-carrier-lie.
Click to expand...
Click to collapse
Thank you, very interesting!
Did you have to tweak IMS settings in Hidden menu to make it work?
Again, I got VoLTE working easy enough, but I could NOT get VoWiFi going, despite many hours of testing various IMS settings. That's on a LS998U converted to US998.
It DID work right away after I flashed H931 ROM on the same phone, so I know it's not the IMEI and that I'm provisioned for VoWiFi.
I took dozens of screenshots of the IMS settings on H931 in the hope of replicating them on US998, but many of the settings from H931 don't even exist on US998. That's when I concluded that AT&T had added some proprietary code to their VoWiFi implementation.
Of course your post would indicate that may not be the case after all.
I do notice that VoWiFi doesn't show as provisioned in the Testing menu on US998 ROM. Of course it showed as provisioned on H931 ROM. So focus should be on IMS registration to get it to pick up that provision.
So now I am tempted to go back into the IMS rabbit hole to try and get it working. But that's a very deep rabbit hole, and I don't really have the time
Edit: Could I ask you to verify with your BIL that he really has VoWiFi working, not just VoLTE?
Just making a phone call and seeing that it stays on LTE won't prove that it's using VoWiFi. Neither is the HD icon on your end, since VoWiFi and VoLTE both use the same codecs.
I guess the best way would be to see that WiFi Calling is provisioned in Testing menu *#*#4636#*#* | Phone information
Alternatively toggle Hidden Menu *#546368#*998# | Field Test | IMS Settings | GPRI VoLTE/VoWiFi | Registration | VoWiFi | VoWiFi indication to show VoWiFi indicator in the status bar.
Thanks in advance :good:

TheDannemand said:
Thank you, very interesting!
Did you have to tweak IMS settings in Hidden menu to make it work?
[snip]
Click to expand...
Click to collapse
No, I didn't have to do anything... it appears to have just worked. Again, the BIL was coming from an ATT phone, so it was simply a SIM card swap... so it may have been enabled on his old phone, so it "carried over" easily? I don't know... but I didn't have to do anything other than flash US998 (KDZ), swap SIMs, and then setup his login etc. I don't remember if I gave him root, but he is BL Unlocked IIRC. He doesn't need the fancy rooting and stuff, so I didn't want to confuse him with that.

schwinn8 said:
No, I didn't have to do anything... it appears to have just worked. Again, the BIL was coming from an ATT phone, so it was simply a SIM card swap... so it may have been enabled on his old phone, so it "carried over" easily? I don't know... but I didn't have to do anything other than flash US998 (KDZ), swap SIMs, and then setup his login etc. I don't remember if I gave him root, but he is BL Unlocked IIRC. He doesn't need the fancy rooting and stuff, so I didn't want to confuse him with that.
Click to expand...
Click to collapse
Thank you. Again!
I still can't see any logical difference, although obviously there has to be one. Say the provisioning was carried over on the SIM card previously activated in an AT&T phone. However my account and SIM showed as provisioned -- and worked with VoWiFi -- when running the H931 ROM. But didn't work when moving the SIM to a phone with a US998 ROM. (I have two LS998-converted-US998 phones and was able to move the SIM between the H931 and my other US998 at the time.) And if it were the genuine AT&T IMEI that made the difference, then why did it work when my LS998 IMEI phone had the H931 ROM
Had it been just VoLTE I could understand, since that works out of the box on US998, as long as provisioned on the account (and supported by the SIM). And had it required some tweaking of IMS settings to get VoWiFi going, I could understand that too, as I obviously haven't tried all combinations of the hundreds of settings.
Oh well. I apologize, I don't mean to sound like I am doubting you. It just frustrates me to know that the ROM can do it, but I cannot for the life of me see how. Particularly not without any setup.
I am just going to chalk it up to a miracle case instead disappearing down the rabbit hole again. I spent too much time down there last time around.
Thanks again!
Obviously if anybody discovers anything about how to make AT&T WiFi Calling work on US998, I am highly interested.
ChazzMatt sorry for hijacking your thread there for a while. I guess it was somewhat within the topic

I feel your pain, and I'm not taking offense... we're all trying to learn here!
Just to throw another wrench into the situation, with my phone (US998 converted to VS996, and originally connected to VZ) I had to do the IMS settings game to get VOWIFI/VOLTE working. From what I see here, not many others had to do that... so I fell on that side of the puzzle back then... kinda like how you're having this issue now on ATT.
I posted some info on how to get these working in VZ-land... and I had to use ShortcutMasterLite because I couldn't get VS996 to show me any hidden menus. I found SML easier anyway. That said, you may try to see my post about that and see if that helps you with some ideas on how to get it working on your ATT. Note also that on VZ I believe you have to keep the Verizon Mobile app to let these work. I don't think ATT has anything like that, but if you have frozen any apps or something, maybe that adds to the problem? I didn't do any of that for the BIL's phone...
If he lived closer to me, I'd offer to help dig into the settings (maybe the SML options, for example) to see if we can get you running... but unfortunately that's not an option. And he's not technical enough to follow me through the process, so I can't bother him to do it remotely.
I might suggest trying to go to a fresh US998 and seeing if it works "out of the box". If not, we can try SML things (like I did with my VZ setup) and see if that helps you get running. Or there may be other threads that can help in a similar manner, that are more specific to ATT.
EDIT: This thread https://www.howardforums.com/showthread.php/1912223 seems to imply that ATT does check the IMEI "often" and then decides if they will allow VOLTE/VOWIFI. Again, since the BIL's phone was H931, the IMEI is probably "good" on their side, so they let it happen.
If you ask me, this is all BS and should be illegal. They're effectively saying it "can't" be done, when there is no real reason for this, as we have proven many times here with various devices. This is just like the old days of POTS phones where ATT would say you have to buy "their" hardware to use the phone. It was a lie then, and this is just another modern version of the same lie. I expect the current FCC won't do jack for this, but maybe next year (I hope) things can be improved and potentially they might do something about it. It would likely take a large push by many... not sure how to make that happen.
Given all this, I might suggest trying an MVNO instead... F-VZ and F-ATT if they want to pull this crap. I'm so much happier on TW now... everything works great!

schwinn8 said:
This thread https://www.howardforums.com/showthread.php/1912223 seems to imply that ATT does check the IMEI "often" and then decides if they will allow VOLTE/VOWIFI.
Again, since the BIL's phone was H931, the IMEI is probably "good" on their side, so they let it happen.
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Yeah, as I said earlier, I think the native AT&T IMEI is helping tremendously, even though the phone isn't currently on AT&T firmware:
ChazzMatt said:
I think the key here is it's still AT&T IMEI and he probably already had that feature enabled from a previous AT&T branded phone?
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___
TheDannemand said:
ChazzMatt sorry for hijacking your thread there for a while. I guess it was somewhat within the topic
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No problem. I said pretty much all that can be said on the actual thread topic in posts #1 and #3.
The rest of this is ancillary and it's OK.
I expect as January 2021 gets closer we'll see more U.S. users getting anxious and possibly even other LG device owners (V20?) asking questions in here -- even though this is V30 series specific.
I know some LG G6 were able to get VoLTE on LOS, but not others. Like Sprint maybe? Don't remember. But in the G6 Telegram thread one of the rules you could get warned/banned over was asking about VoLTE. . Because people just wouldn't stop.
Then people tried to tell our LOS dev to look at the G6 Sprint configuration (if that was it) for V30. But he says it doesn't apply like that. Different chipset, different phone series, and the G6 people couldn't even get VoLTE for all their carriers.

schwinn8 said:
I feel your pain, and I'm not taking offense... we're all trying to learn here!
...
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Thank you for bearing with me
I agree 100% about the shenanigans of AT&T and the other big carriers. But in my case I am certain that my problem isn't one of account provisioning or AT&T blocking my use of VoWiFi: I use Red Pocket (MVNO) who expressly provides VoLTE on all 4 carriers (as long as the phone supports it, some limitations on Sprint) and VoWiFi on AT&T, TMO and VZ. Both are enabled on my account.
And indeed, the moment I flash H931 ROM, it works right away. On US998 ROM, VoLTE works right away, but VoWiFi shows up as not provisioned. I am sure the problem is in the US998 ROM not negotiating VoWiFi properly and thus not picking up the provision. This is consistent with findings of other AT&T users in the H931 ROM thread who Frankenphone and root their H931s, then flash back to that H931 ROM in order to get VoWiFi working again.
The only explanation I can think of why this works on your BIL's phone with US998 ROM is that either his H931 IMEI or his AT&T SIM means that a different (simpler?) VoWiFi provisioning process takes place because AT&T trusts the hardware. An unlocked IMEI can STILL use VoWiFi, but the provisioning then requires a different path -- which is known to the H931 ROM, and possibly to newer phones, but not to US998.
So just to state this very clearly: This would mean that EITHER an AT&T IMEI (or maybe SIM) OR AT&T firmware (such as H931) is required to negotiate AT&T VoWiFi provisioning. The VoWiFi provisioning process is far more complex than VoLTE, the latter relying on an already established mobile network connection to the carrier. VoWiFi can provide access to the carriers network through any WiFi network, so extra steps are required to authenticate the user.
The IMS implementation is significantly different on H931, with hundreds of settings and some services which are not found on US998.
As for IMS settings, they're all fully accessible in the Hidden menu on US998 and H931 (if I understand you correctly, that isn't the case on VS996 ROM). ShortcutMasterLite gives access to a few Settings menus to toggle WiFi calling, but nothing that cannot be done through the Hidden menu.
ChazzMatt said:
No problem. I said pretty much all that can be said on the actual thread topic in posts #1 and #3.
The rest of this is ancillary and it's OK.
I expect as January 2021 gets closer we'll see more U.S. users getting anxious and possibly even other LG device owners (V20?) asking questions in here -- even though this is V30 series specific.
I know some LG G6 were able to get VoLTE on LOS, but not others. Like Sprint maybe? Don't remember. But in the G6 Telegram thread one of the rules you could get warned/banned over was asking about VoLTE. . Because people just wouldn't stop.
Then people tried to tell our LOS dev to look at the G6 Sprint configuration (if that was it) for V30. But he says it doesn't apply like that. Different chipset, different phone series, and the G6 people couldn't even get VoLTE for all their carriers.
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Click to collapse
Thank you!
VoLTE really shouldn't be a problem for you: You already use US998 stock ROM, which supports it our of the box. And if AT&T prepaid won't provide it, then use Red Pocket -- or any carrier or MVNO which may provide it come that time. I seem to recall you have poor AT&T reception in your house, so you could even consider a TMO MVNO, which would give you BOTH VoLTE and VoWiFi out of the box.
As long as you don't buy TMO phones, but I don't think there is any risk of that

TheDannemand said:
Thank you for bearing with me
The only explanation I can think of why this works on your BIL's phone with US998 ROM is that either his H931 IMEI or his AT&T SIM means that a different (simpler?) VoWiFi provisioning process takes place because AT&T trusts the hardware. An unlocked IMEI can STILL use VoWiFi, but the provisioning then requires a different path -- which is known to the H931 ROM, and possibly to newer phones, but not to US998.
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To be clear, the implication of your statement is that US998 CAN do VOWIFI, and that ATT is blocking it... because the BIL's phone DOES work, hence US998 can understand and allow VOWIFI. Correct? Or am I missing something?
Again, the carriers are lying about the matter... they say it "won't work" when, in fact, it does... that's what's most annoying.
Of course, this doesn't answer your question/issue of why it's not working on your device....

schwinn8 said:
To be clear, the implication of your statement is that US998 CAN do VOWIFI, and that ATT is blocking it... because the BIL's phone DOES work, hence US998 can understand and allow VOWIFI. Correct? Or am I missing something?
Again, the carriers are lying about the matter... they say it "won't work" when, in fact, it does... that's what's most annoying.
Of course, this doesn't answer your question/issue of why it's not working on your device....
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Click to collapse
I don't believe AT&T is actively blocking it, at least not on Red Pocket (whom expressly provide it). What I am saying is they provide an easier path for the phone to pick up the VoWiFi provision when an AT&T IMEI is detected (supported by US998) and a more difficult path on phones without an AT&T IMEI. H931 supports this more difficult path, but US998 does NOT. Or at the very least does it require changes to US998's built-in AT&T configuration (so-called MCFG) which we haven't figured out yet.
Essentially it's what you and Chazz have been saying all along: The AT&T IMEI is why it's working for your BIL. Except an AT&T IMEI is NOT required if you're on H931 ROM (as I and others found).
No doubt AT&T marketing will say anything to sell their hardware and their services. In this case VoLTE and VoWiFi absolutely DO work on their network through Red Pocket, even on non-AT&T IMEI phones. AT&T is just making it difficult for us. I think there is a good chance newer phones will work out of the box, as they may have updated AT&T MCFG
I'll probably pick up my experiments on this again at some point. Your posts have given me some ideas. I am just too busy with other things at the moment.
Thanks again for your input!

I don't believe ViWIFI is being blocked by the big three us carriers via IMEI. Roms like US998 for the V30 and other open market models have a carrier config file for provisioning in /oem/OP/OPEN_US/config/vo_carrier.xml. If you look, you'll see VoLTE is enabled but VoWIFI and other features associated with calling are off. I am with Verizion and have an open market v30. VoWIFI works fine if I install the VS996 rom. A similar directory structure and vo_carrier.xml does not exist. I take that as evidence that the big carriers force VoWIFI to be disabled by the manufacturer on open market phones. That is just so slimey.
A visit to the G7 forum (https://forum.xda-developers.com/lg-g7-thinq/how-to/wip-guide-enable-volte-vowifi-uk-mobile-t3835167) shows folks in EU region have figured out how to edit vo_carrier.xml and make other adjustments to get VoWIFI running. I am tantalizingly close with Verizon. Provisioning is active, but I can't get the menu to appear in the settings menu and attempts to manually enable VoWIFI and register emergency info using ShortCut Master do not succeed. Ideas welcome! I think this can be cracked.