LMG820UM3 on US Mobile (Verizon) - Need Help - LG G8 Questions & Answers

Hello,
I will try to keep this short and sweet.
I am on US Mobile using the black sim (verizon towers) and currently have a LG v30 that no longer can make calls due to Verizon shutting down cdma beginning of 2023.
I have my brothers Lg G8 ThinQ phone purchased from US Cellular. It is now rooted and I followed this guide to add LTE support for other carriers:
[GUIDE] [NO ROOT REQUIRED] [EPIC UPDATE] How to add VoLTE support for other carriers to the G8 (and other Qualcomm powered LG devices too!)
This guide will not work if you are running Android 12 :( I'm gonna keep the intro simple, been a longtime user here on XDA, and recently I found that my T-Mobile LG G8 only supported VoLTE and VoWifi on, you guessed it, T-Mobile! So I did some...
forum.xda-developers.com
I used the mbn files provided from the guide and loaded a few of the US carriers. Upon putting in the sim, and trying to change settings to get it to work, I can only get data to work but texting/calling (in/our) does not work at all. When attempting to make a call, the 4G indicator also disapears. I contacted US Mobile thinking it maybe was a APN issue but they stated on their end that the phone is incompatible.
Not sure what else to try. My only hunch is maybe reloading mbn files from a downloaded KDZ but I have no clue if that will work (also to download 5 gigabytes takes a few days for me).
Any help is greatly appreciated.
attached is both the phone info and a snapshot of PDC of it showing VZN got activated on the phone with the sim in it.
EDIT:
For if anyone else comes across this. My solution was to crossflash (using the guide in the LG G8 fourms) the open market KDZ and I went with G820QM30c_00_NAO_US_OP_0103.kdz as I had android 11 already installed and that it was the A11 version download the most from here: https://lg-firmwares.com/lg-lmg820qm-firmwares/
I did have to correct my FTM partition but that crossflashing guide links to some good solutions.
*Note: Only issues that I have seen with the version i flashed is i cant add an APN. The button is just missing so had to install an app to view it, and when receiving gifs, they turn into pictures only. both things I can live without as not volte works on verizon (us mobile).

So, which rom would normally work with that carrier? I'd guess the us open version would work, why not just flash that on the G8? I've no idea what bands us cellular rom supports, but I'd trust the correct rom (for the current carrier) to work rather than following that thread to 'add bands'.
I used that thread once, didn't accomplish what I wanted. Not to say it doesn't work, I didn't try that long. But have flashed numerous roms re diff carriers, that always does what it should re correct bands.

Frankly, I am not sure if my reply will be helpful, and I know nothing about the US Mobile specifically, but just wanted to comment as an owner of a G8 originally from the US Cellular. Feel free to ignore this if it seems irrelevant...
I bought my phone second-hand with an original US Cellular A11 stock ROM. Later cross-flashed it to the Canadian Open when A12 became available. Rooted with Magisk. I am using the phone on the Rogers network in Canada. On both ROMs I have no issues with data, voice and text - everything works, including concurrent voice calls and data usage.
A (possibly) dumb question - have you tried the original US Cellular ROM as is, before diving into the guide to add LTE support for other carriers? Is there a chance that it would just work?
Regarding the previous reply, I couldn't find a US Open ROM available for the 820UM models (only for QM), but you could try Canadian Open, for example. My point is to try and make it work with one of the ROMs as is, without messing with some extra steps that may or may not work.

AsItLies said:
So, which rom would normally work with that carrier? I'd guess the us open version would work, why not just flash that on the G8? I've no idea what bands us cellular rom supports, but I'd trust the correct rom (for the current carrier) to work rather than following that thread to 'add bands'.
I used that thread once, didn't accomplish what I wanted. Not to say it doesn't work, I didn't try that long. But have flashed numerous roms re diff carriers, that always does what it should re correct bands.
Click to expand...
Click to collapse
Yeah, I guess i understood that as being able to add the functionality. But after more research, flashing a different rom is more likely to be the solution, which confuses me about adding profiles if it doesn't truly work?
kt-Froggy said:
Frankly, I am not sure if my reply will be helpful, and I know nothing about the US Mobile specifically, but just wanted to comment as an owner of a G8 originally from the US Cellular. Feel free to ignore this if it seems irrelevant...
I bought my phone second-hand with an original US Cellular A11 stock ROM. Later cross-flashed it to the Canadian Open when A12 became available. Rooted with Magisk. I am using the phone on the Rogers network in Canada. On both ROMs I have no issues with data, voice and text - everything works, including concurrent voice calls and data usage.
A (possibly) dumb question - have you tried the original US Cellular ROM as is, before diving into the guide to add LTE support for other carriers? Is there a chance that it would just work?
Regarding the previous reply, I couldn't find a US Open ROM available for the 820UM models (only for QM), but you could try Canadian Open, for example. My point is to try and make it work with one of the ROMs as is, without messing with some extra steps that may or may not work.
Click to expand...
Click to collapse
So yeah, after more research, looks like flashing either the open market or the verizon specific variant would work. I did try it first without any modifications to the us cellular rom but still not everything worked. I have a Lg v30, but few things that are no longer ideal was the recent CDMA discontinuation from verizon at the start of this year, also had recently dropped it and the screen flashes bright white light in your eyes at random times... so lol, not ideal.
What Im probably going to be trying when I get the time is flashing the open market, and if that dosent work, it seems the verizon specific would.
Thanks both for the inputs!

Related

Questions Lumia 900 TelCel

Ok I just got a really sweet deal
150$ brand new in box unlocked Lumia 900 Black... I LOVE IT!!!!!!!!!!!!
now the only thing is...its branded to TelCel mexico
Are the roms in the dev sectoin interchangeable?
Will flashing another rom re-lock my device?
Also any idea why LTE would not show up on my device...its marked 4G
I got the right sim from my provider, and I am in an LTE area
THank you all in advance if you can provide me any insight regarding these questions
rob243 said:
Ok I just got a really sweet deal
150$ brand new in box unlocked Lumia 900 Black... I LOVE IT!!!!!!!!!!!!
now the only thing is...its branded to TelCel mexico
Are the roms in the dev sectoin interchangeable?
Will flashing another rom re-lock my device?
Also any idea why LTE would not show up on my device...its marked 4G
I got the right sim from my provider, and I am in an LTE area
THank you all in advance if you can provide me any insight regarding these questions
Click to expand...
Click to collapse
Not sure about the interchangeable ROMs. But as far as I know Telcel don't sell Lumia 900s that supports LTE.
Heck, not even the iPhone 5 is LTE at the moment. However iPhone 5 can be upgraded to LTE with a software update.
Cheers,
Rayan
Sent from my GT-N7000 using Tapatalk
Ok I just got a really sweet deal
150$ brand new in box unlocked Lumia 900 Black... I LOVE IT!!!!!!!!!!!!
now the only thing is...its branded to TelCel mexico
Are the roms in the dev sectoin interchangeable?
Will flashing another rom re-lock my device?
Also any idea why LTE would not show up on my device...its marked 4G
I got the right sim from my provider, and I am in an LTE area
THank you all in advance if you can provide me any insight regarding these questions
Click to expand...
Click to collapse
If you have 4G on your screen it is LTE, if you see H is HSPA,
I have a Rogers Lumia 900 LTE from Canada, and I had a lot of connectivity issues, I loaded it with Telcel MX firmware and I can tell you its the best ROM available.
1.- Fixed all Connectivity issues
2.- APN settings, including MMS are automatically detected
3.- Removed all Rogers Branding (Rogers Lumia 900 doesn't have any branding on the exteriors, so after flashing with Telcel ROM its like a new factory unlocked device with no branding at all)
4.- Telcel ROM doesn't have any operator custom preloaded apps
5.- The only thing I was nervous was the disappearance on the LTE logo, but apparently they only replaced LTE and HSPA+II by 4G.
6.- Internet Sharing started working (Didn't work with Rogers Firmware with my current carrier CLARO)
There si another post that mention this:
http://forum.xda-developers.com/showthread.php?t=1905734&page=2
Bottom line, stay with it, it works great!!
thanks alot
Thanks alot for this, I did notice that the telcel rom has no carrier branding, and after reading all your points concerning rogers rom I am definately staying with this one "if its not broke - don't fix it" very helpful post mods feel free to close this thread.
When you changed ROMs, did you run into a signature error? How did you overcome that? It seems some handsets are tied to their specific carrier -- short of upgrading with a same carrier ROM, the update fails with message 'problem with file signature'. or something along those lines.
Cheers
aquanaut88 said:
When you changed ROMs, did you run into a signature error? How did you overcome that? It seems some handsets are tied to their specific carrier -- short of upgrading with a same carrier ROM, the update fails with message 'problem with file signature'. or something along those lines.
Cheers
Click to expand...
Click to collapse
I have a Rogers phone that is unlocked and being used on Bell and it is flashed with this rom as well. I used Nokia Care Suite and got the rom through the data package manager. It flashed without any problems. There haven't been any updates through Zune yet so I don't know what will happen when 7.8 is released. If it doesn't do the update automatically I'll just update it again through Nokia Care Suite.
aquanaut88 said:
When you changed ROMs, did you run into a signature error? How did you overcome that? It seems some handsets are tied to their specific carrier -- short of upgrading with a same carrier ROM, the update fails with message 'problem with file signature'. or something along those lines.
Cheers
Click to expand...
Click to collapse
Didn't happened anything like that to me, just looked for my RM in Data Package Manager downloaded the latest one and loaded it using Nokia Care Suite
Thanks... glad it at least works for the Rogers devices. I'm guessing there's something added to the AT&T versions which prevent swapping carrier ROMs, even within the same RM group.
I've tried modifying the product code both in the file names and within the files. Still fails with file signature error.
aquanaut88 said:
Thanks... glad it at least works for the Rogers devices. I'm guessing there's something added to the AT&T versions which prevent swapping carrier ROMs, even within the same RM group.
I've tried modifying the product code both in the file names and within the files. Still fails with file signature error.
Click to expand...
Click to collapse
I have the same issue, maybe try flashing it to an earlier ROM from AT&T that doesn't have that limitation?
Doing a field exercise with my unit so it may be awhile before I get to try it myself.
I actually tried that a week ago... rolled AT&T rom back to 8112 (nothing earlier available on NaviFirm list). Same complaint.

[Q] No sim detected

Hay guys i just recently flashed my g2 ls980 with stock zve firmware. Everything us working fine except that sim is not being detected no matter what i try. I am really confused as i am a total newbie and am unable to understand technical stuff.
With stock ZVE (that's pure Sprint stock) which SIM are you referring to because with that stock ROM on the Sprint G2 the only SIM card that will ever be recognized at all will be one from Sprint to enable LTE network support.
So... I don't like to assume things, hence the question: what SIM card are you talking about?
The LS980, aka the Sprint G2 variant and the same phone I have, is network locked aka SIM locked to Sprint only if you're running a pure stock ROM which is exactly what ZVE is. The only ways to get the SIM unlocked for other network operation would be a) do a somewhat complicated set of tasks to get it to work (not worth the hassles really and certainly beyond your admitted "newbie" status with respect to this level of tech) or b) install a custom ROM like CloudyG2 (the name just changed today, prior it was known as CloudyG3 but that confused people with the LG G3 and they were trashing their phones trying to install it - it's a G2 ROM ported from the actual G3).
There are other ROMs as well that unlock the LS980 for GSM operation aka regular SIM cards, you may end up using one of them to get proper GSM functionality - LTE support is spotty depending on the networks in your area and the Sprint G2 only supports a few LTE network bands.
Thank you very much for your reply @br0adband. I was able to use my GSM (telenor) sim again but i encountered some problems. Here is the link to my post:
http://forum.xda-developers.com/general/xda-assist/lg-g2-ls980-t3009569
Really sorry for creating a new post as i was unable to find this post in search

H4233 and TWRP/root/ROMS

Morning, everyone.
I'm in Japan and just got the X2 H4233 variant. Seems like AOSP isn't supported for this variant (I looked all over Akihabara for an American or international phone, but to no avail.) anyhow, what are my options for rooting and ROMS? I'd really like plain old Android.
Thanks!
You should try the AOSP made for H3113, many people reported that also worked for other variants as H3123
Thanks! I just checked out the thread and it might not work. H4233 is a dual sim model, so I may have to wait until someone builds one for this variant or at least one with dual sim.
On the bright side, I learned that I can unlock the bootloader, so I should be able to root it. However, I'm still not even sure if I can install TWRP.
Also you can ask in the forum if someone else tried with the same variant that you have
https://forum.xda-developers.com/xa2-ultra/help/unlocking-bootloader-rooting-t3762968/page20
In this forum, you can read that the TWRP for XA2 works on the XA2 Ultra, probably will in your variant and also there are instructions how to root your phone
Seems someone recently tried it and it works. That's one step closer!
Oops. Double post.

LG G8 Thinq T-mobile update Android 11

im T-mobile G8 user and im frustrated that my phone still works on Android 10,when almost every carrier G8 phones received Android 11.
my question is,will ever my T-mobile G8 receive android 11?
thanks
BloodMist said:
im T-mobile G8 user and im frustrated that my phone still works on Android 10,when almost every carrier G8 phones received Android 11.
my question is,will ever my T-mobile G8 receive android 11?
thanks
Click to expand...
Click to collapse
Every carrier? What? I know of 3 versions of a11 for the G8; 1) the korean Open 2) The Verizon version 3) The Canadian Open.
Hardly 'every carrier'. Updates are coming, slowly, and there is no guarantee any one individual carrier will update their software. That's an LG issue really, they have contracts with carriers with various stipulations that can affect say US Open version, which supposedly can't be updated unless all the other carriers update theirs first. It's complicated.
Call t-mobile, they can tell you when / if an update will be available. And of course, there's always the issue of what you've done to your phone. If you do something like unlock the bootloader, you won't get an update even if there is one.
cheers
AsItLies said:
Every carrier? What? I know of 3 versions of a11 for the G8; 1) the korean Open 2) The Verizon version 3) The Canadian Open.
Hardly 'every carrier'. Updates are coming, slowly, and there is no guarantee any one individual carrier will update their software. That's an LG issue really, they have contracts with carriers with various stipulations that can affect say US Open version, which supposedly can't be updated unless all the other carriers update theirs first. It's complicated.
Call t-mobile, they can tell you when / if an update will be available. And of course, there's always the issue of what you've done to your phone. If you do something like unlock the bootloader, you won't get an update even if there is one.
cheers
Click to expand...
Click to collapse
ATT has also released A11 ? I've seen in some forums that it has.
For what it's worth on reddit T-Mobile users are saying they're getting the update. I can't speak for myself because I'm using a custom rom but yeah...it's out there
therealrayzzor said:
For what it's worth on reddit T-Mobile users are saying they're getting the update. I can't speak for myself because I'm using a custom rom but yeah...it's out there
Click to expand...
Click to collapse
Quite possible, although i don't see it on the lg-firmwares site yet. BUT THE US OPEN IS OUT !!!
mangojain said:
Quite possible, although i don't see it on the lg-firmwares site yet. BUT THE US OPEN IS OUT !!!
Click to expand...
Click to collapse
Actually, that's not the US Open variant, that's the CCA variant. I'm not sure what the difference is, maybe someone can elaborate.
The lg firmware site has it listed as the US Open, but download and compare the hash tags, they don't match. But if you download the CCA version the hash will match.
I've actually never heard of CCA before, it's Competitive Carriers Association, I've heard of BrightPoint, etc, but not cca. Until someone tries it, we're not sure which carriers it's compatible with re volte and vowifi type stuff.
cheers
AsItLies said:
Actually, that's not the US Open variant, that's the CCA variant. I'm not sure what the difference is, maybe someone can elaborate.
The lg firmware site has it listed as the US Open, but download and compare the hash tags, they don't match. But if you download the CCA version the hash will match.
I've actually never heard of CCA before, it's Competitive Carriers Association, I've heard of BrightPoint, etc, but not cca. Until someone tries it, we're not sure which carriers it's compatible with re volte and vowifi type stuff.
cheers
Click to expand...
Click to collapse
My phone is originally BrightPoint. I flashed the US OPEN listed on the lg firmware site, hoping that it wouldn't throw up an NT ID error, but it does :-(
Additionally VoWiFi worked with the Canadian Open but it's not working with this rom. The default email app is also missing in the US version.
The software version shows as V30c-USA-XX, with a security patch of Dec '21.
mangojain said:
My phone is originally BrightPoint. I flashed the US OPEN listed on the lg firmware site, hoping that it wouldn't throw up an NT ID error, but it does :-(
Additionally VoWiFi worked with the Canadian Open but it's not working with this rom. The default email app is also missing in the US version.
The software version shows as V30c-USA-XX, with a security patch of Dec '21.
Click to expand...
Click to collapse
Interesting that it's not working vowifi and nt error code, that should absolutely not be the case if it was the USA version, no way. At least not if you're here in the states.
Where are u using it? Canada? That might be at least part of the reason, have you ever used the a10 US Open there? How did that work?
AsItLies said:
Interesting that it's not working vowifi and nt error code, that should absolutely not be the case if it was the USA version, no way. At least not if you're here in the states.
Where are u using it? Canada? That might be at least part of the reason, have you ever used the a10 US Open there? How did that work?
Click to expand...
Click to collapse
Sorry for not clarifying earlier, I'm using the phone in India
To get volte and vowifi to work, I change the target region & country to ESA and operator to OPEN in cust.prop. And i also edit the carrier_code, telephony and vo_config files to contain details of the networks in India.
VoLTE has worked with many A10 roms, but VoWiFi worked for the first time with the A11 Canadian Open.
PS - Since I need an unrooted phone for Microsoft apps such as Outlook and Teams, I uninstall magisk after making these configuration changes.

Changing Firmware G810EA to G810EAW

Hi, it is possible and safe to change the firmware of LG g8s g810ea to g810eaw? I thought about flashing new firmware with LG up.
brazer1 said:
Hi, it is possible and safe to change the firmware of LG g8s g810ea to g810eaw? I thought about flashing new firmware with LG up.
Click to expand...
Click to collapse
I know nothing about the G8s, never owned one, but generally speaking, pretty sure changing the firmware is much the same as the G8. There are some no no's, like if you have dual sim to single sim, or vice versa, but you don't say anything about the firmware you're referring to... it might help to know why you want to change, iow, what are you trying to accomplish?
But more than likely, it shouldn't be a problem. I'd suggest first to ask on the tele group for the v50 / G8 devices, they are more international experience there and will be more certain. Cheers
Thank you for a quick answer. My LG G8s is a g810ea version. I won’t to flash g810eaw firmware because the are fresher builds. Newest build for eaw is 30c from 7/2022, when ea 30a is from 12/2021. Also LG Germany declared Android 12 update. Morover I couldn’t find setting for VoWifi and Volte. All firmwares are meant for LG G8s, which is available in 3 versions g810ea, g810eaw and g810ra.
brazer1 said:
Thank you for a quick answer. My LG G8s is a g810ea version. I won’t to flash g810eaw firmware because the are fresher builds. Newest build for eaw is 30c from 7/2022, when ea 30a is from 12/2021. Also LG Germany declared Android 12 update. Morover I couldn’t find setting for VoWifi and Volte. All firmwares are meant for LG G8s, which is available in 3 versions g810ea, g810eaw and g810ra.
Click to expand...
Click to collapse
From what I can see on the firmware pages, should be okay. Always keep in mind that ea individual rom has certain bands enabled, so be sure the bands it has will meet your needs.
Also, vowifi and volte are dependent on your carrier, not just the phone. The G8s is capable of both, but if your carrier doesn't allow them then there's no way to make the work. And, some carriers (like US at&t), only allow it to work on their phones - or at least that was the case at one time.
It's always best to flash an 'open' version Rom, if there's one available with the bands you need, and your carrier allows a phone on their network that isn't running their specific rom (usually an mvno type carrier is best).
cheers

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