Sim unlock options for GSM Variant - HTC 10 Questions & Answers

So, after searching the forum, I haven't found anything that really answers my question...
I have the GSM Variant of the HTC 10. It's currently locked to Bell Mobility in Canada. I am looking to unlock this phone without paying Bell the fees they charge for unlocking. From the XDA searches and reading I've done, it looks like there may be a free way of accomplishing this... I found a post that indicates that the Sprint method may or may not work, but you need S-Off...
I found another post that suggests its the exact same as the HTC One M9 and I can use the directions from there. It also indicated that it was only for the Sprint HTC 10 too...
My question is, is there a free unlock method for the GSM HTC 10? Or does it only work with the Sprint version?

According to some googlling, you share the same phone as US unlocked model, based on MID (model ID). You would need S-off to flash a different modem though. modem partition is blocked by s-on feature. sunshine app and java cards are the only way to S-off. both are paid though, sunshine $25.
CID: BM 001
MID: 2PS650000
proceed at your own risk and research well :good:

Right. I think I knew that... ...which means that changing the CID would allow me to flash any RUU for Model 2PS6500, and should theoretically work period.
Which leads to another question I had after posting... Would flashing the US Unlocked RUU remove the sim lock on the phone? I've heard that an RUU replaces everything on the phone with pristine, shiny new code straight from HTC... Would this also replace the code that effectively locks the phone to Bell?
If that is the case, this could be far too good to be true...
Edit: Almost forgot. Perhaps slightly off topic, but what is a java card?

atirox said:
Right. I think I knew that... ...which means that changing the CID would allow me to flash any RUU for Model 2PS6500, and should theoretically work period.
Which leads to another question I had after posting... Would flashing the US Unlocked RUU remove the sim lock on the phone? I've heard that an RUU replaces everything on the phone with pristine, shiny new code straight from HTC... Would this also replace the code that effectively locks the phone to Bell?
If that is the case, this could be far too good to be true...
Edit: Almost forgot. Perhaps slightly off topic, but what is a java card?
Click to expand...
Click to collapse
I've read that changing the MID/CID and flashing a modem is enough but.... since I can't quote it I cannot help you with that unfortunately. but should give you a running start, good luck

Thanks a bunch for the info. The thanks button didn't seem like enough thanks for the info.
Also, I'll post my procedures and results here, so if it doesn't work, at least we have a record.

atirox said:
Thanks a bunch for the info. The thanks button didn't seem like enough thanks for the info.
Also, I'll post my procedures and results here, so if it doesn't work, at least we have a record.
Click to expand...
Click to collapse
you're welcome and I just google searched quickly and didn't find anything solid but again I'm sure you'll figure out a way.

So, just an update.
I used a website that allowed me to use trialpay to get my SIM Lock code, which worked beautifully.
Unfortunately, Bell Mobility seems to be in the market of continuing to cripple their phones... I've inserted my Rogers sim card and found that voice and text both work on Rogers. Data, does not (cannot set APN settings, not don't know how), along with LTE. Given that the phone supports all the bands that Rogers uses in Canada, I would not be overly surprised to find out that Bell crippled the radio firmware to ensure that the phone would perform it's best only on the Bell network. Heck, they did it with the CDMA Nokia phones, and with the old school Blackberries to ensure their revenue stream...

atirox said:
So, just an update.
I used a website that allowed me to use trialpay to get my SIM Lock code, which worked beautifully.
Unfortunately, Bell Mobility seems to be in the market of continuing to cripple their phones... I've inserted my Rogers sim card and found that voice and text both work on Rogers. Data, does not (cannot set APN settings, not don't know how), along with LTE. Given that the phone supports all the bands that Rogers uses in Canada, I would not be overly surprised to find out that Bell crippled the radio firmware to ensure that the phone would perform it's best only on the Bell network. Heck, they did it with the CDMA Nokia phones, and with the old school Blackberries to ensure their revenue stream...
Click to expand...
Click to collapse
Maybe now is the time for that s-off and flashing of U.S Unlocked ruu.
The other thing you can try before spending the cash to s-off is unlocking your bootloader, flashing a custom rom and seeing if you can add a new apn from there. I'm very much surprised Bell would block that btw, I've unlocked Bell gsm phones and added new apn settings in the past.

While with XDA im all for free unlocking etc, if you are not S-off then it might be a bit hard
https://sim-unlock.net/site/HTC/10/
Ive had a stupid amount of phones and ive used these guys everytime ive needed a SIM unlock done.
Never failed once and if you can spend the money, it might be worth it in your case here... Against s-off - $25...
For me its a no brainer... I mean for 9 euros?....
But if you have already unlocked and they have crippled it like you say, then deffo go for s off

Fellas, correct me if I'm wrong, but if the SIM is unlocked, then all that's needed is to unlock the bootloader. That can be done for free via HTC Dev if you have tech chops, or via Sunshine (probably the better choice anyway). Then all that's needed is to change the CID and MID, and flash a WWE RUU. That would solve the problem, no?

BillTheCat said:
Fellas, correct me if I'm wrong, but if the SIM is unlocked, then all that's needed is to unlock the bootloader. That can be done for free via HTC Dev if you have tech chops, or via Sunshine (probably the better choice anyway). Then all that's needed is to change the CID and MID, and flash a WWE RUU. That would solve the problem, no?
Click to expand...
Click to collapse
Yeah that's what I was suggesting as well. Bootloader unlock and flash a custom rom first to see if he's able to add new apns that way, and if that fails just go full s-off and run the unlocked RUU (unlocked is the better option here over wwe, same mid I believe and better support for updates).

BillTheCat said:
Fellas, correct me if I'm wrong, but if the SIM is unlocked, then all that's needed is to unlock the bootloader. That can be done for free via HTC Dev if you have tech chops, or via Sunshine (probably the better choice anyway). Then all that's needed is to change the CID and MID, and flash a WWE RUU. That would solve the problem, no?
Click to expand...
Click to collapse
This is my thinking... I wanted the US Unlocked version anyway, but got the Bell one since I live in Canada, and was with Bell anyway. Actually, the SIM lock and the bootloader lock are two different locks. You don't have to remove the Simlock to remove the bootloader lock.
Tarima said:
Maybe now is the time for that s-off and flashing of U.S Unlocked ruu.
The other thing you can try before spending the cash to s-off is unlocking your bootloader, flashing a custom rom and seeing if you can add a new apn from there. I'm very much surprised Bell would block that btw, I've unlocked Bell gsm phones and added new apn settings in the past.
Click to expand...
Click to collapse
I thought about it, but in the end I want US Unlocked due to speediness of updates as well as no more Bell tainted android.
Here is why I suspect Bell blocked it... When I go to view available APN's, all it shows on screen is a message essentially saying APN's cannot be added for this provider.. Also (took me a bit to clue in), LTE doesn't work on Rogers. If I had to guess, Bell wanted to make sure all the HTC 10's it sold stayed on it's network. It wouldn't surprise me in the slightest... The Nokia 6275i was a kick butt awesome CDMA phone back in it's day. AMAZING call quality. Think VoLTE quality on 1xRTT. I don't know how they did it, but it must be a mix of pixie dust and unicorn blood... Anyway, every 6275i Bell sold was severely crippled. No Nokia Maps, just Bell's lame interpretation. Google maps wouldn't work either because it couldn't access the GPS, only Bells navigation app could. Couldn't set a custom ringtone unless it was purchased from Bell. Yet every other 6275i didn't suffer from these issues... Just ones sold by Bell.

So, an update to those interested....
I am now S-Off running US Unlocked firmware.
CID: BS_US001
MID: 2PS650000
Flashing to US Unlocked firmware seemed to do the trick for data. I can now set APNs and data does work. YAY!
Things to do:
1) Figure out why LTE signal sucks...
For whatever reason, the HTC 10 doesn't get LTE at home... I had a Samsung Galaxy S7 (SM-G930W8) briefly which didn't always get LTE at home, but it at least had useable signal, whereas the HTC 10 doesn't, at least not on Rogers. When flashed with Bell firmware it worked as good as the S7 did. I have a theory that when I ran the RUU to change firmware variants, it didn't update the modem firmware... Also, upon further research, it looks like there are partitions that store configuration data for the modem called modemst1 and modemst2, which I'd bet are still configured for Bell, which means they probably set it up to never use LTE on another Canadian network unless you can't get signal on anything else...
2) Figure out how to change Device Certification back to certified.
I'm pretty sure this is because the bootloader is still unlocked... I'm going to try setting it back to locked which shouldn't make a difference to my ability to flash because the phone is S-Off anyway but it may make the difference to Google's Device Certification
3) Maybe try an aftermarket rom, etc... Basically whatever I want.
I actually quite like HTC Sense... Not sure I want to get rid of it just yet. Was thinking of going with Viper due to Wi-Fi Calling being enabled/supported since Rogers supports Wi-Fi Calling, and I refuse to believe I can't make it work on here... It worked on the S7 (same model my wife had on Bell), so why can't it work here? I am also open to suggestions as to good roms to use, so if you think it's good, let me know what rom and why and I may just give it a shot...

atirox said:
So, an update to those interested....
I am now S-Off running US Unlocked firmware.
CID: BS_US001
MID: 2PS650000
Flashing to US Unlocked firmware seemed to do the trick for data. I can now set APNs and data does work. YAY!
Things to do:
1) Figure out why LTE signal sucks...
For whatever reason, the HTC 10 doesn't get LTE at home... I had a Samsung Galaxy S7 (SM-G930W8) briefly which didn't always get LTE at home, but it at least had useable signal, whereas the HTC 10 doesn't, at least not on Rogers. When flashed with Bell firmware it worked as good as the S7 did. I have a theory that when I ran the RUU to change firmware variants, it didn't update the modem firmware... Also, upon further research, it looks like there are partitions that store configuration data for the modem called modemst1 and modemst2, which I'd bet are still configured for Bell, which means they probably set it up to never use LTE on another Canadian network unless you can't get signal on anything else...
2) Figure out how to change Device Certification back to certified.
I'm pretty sure this is because the bootloader is still unlocked... I'm going to try setting it back to locked which shouldn't make a difference to my ability to flash because the phone is S-Off anyway but it may make the difference to Google's Device Certification
3) Maybe try an aftermarket rom, etc... Basically whatever I want.
I actually quite like HTC Sense... Not sure I want to get rid of it just yet. Was thinking of going with Viper due to Wi-Fi Calling being enabled/supported since Rogers supports Wi-Fi Calling, and I refuse to believe I can't make it work on here... It worked on the S7 (same model my wife had on Bell), so why can't it work here? I am also open to suggestions as to good roms to use, so if you think it's good, let me know what rom and why and I may just give it a shot...
Click to expand...
Click to collapse
FYI you can clear the modem settings using the following from bootloader mode:
fastboot erase modemst1
fastboot erase modemst2

Tarima said:
FYI you can clear the modem settings using the following from bootloader mode:
fastboot erase modemst1
fastboot erase modemst2
Click to expand...
Click to collapse
I tried with HTC_fastboot and normal fastboot but:
Code:
htc_fastboot v3.0.9.2 (2015-05-29)
erasing 'modemst2'...
FAILED (remote: Partition modemst2 erase not supported)
finished. total time: 0.001s
htc_fastboot finished. total time: 0.235s

nightauthor said:
I tried with HTC_fastboot and normal fastboot but:
Click to expand...
Click to collapse
From bootloader mode?

Tarima said:
From bootloader mode?
Click to expand...
Click to collapse
Yeah, I found the bootloader thing in another thread, thanks for the follow up though.

I've tried flashing US Unlocked, was prompted for a sim unlock code when I put a Verizon sim in my Tmobile phone.
So I tried flashing Verizon firmware, it told me that my verizon sim... was not a verizon sim.
Did the modem reset, didnt make a difference. Not sure what else to try.

Updates
So, as an update to any parties interested,
I've resolved some of the data issues I was having, where data didn't seem to work unless I was using LTE.
It seems that it's a joint problem between me and Rogers.
My problem was that even though the US Unlocked variant appears to be using the same radio firmware as the Bell variant, the Bell variant seems to have better programming, since I've been getting stronger signal in more areas, as well as slightly better throughput on HSPA connections. The issue I had with APN's and Bell firmware seemed to sort its self out after flashing back to the Bell variant from US Unlocked.
The Rogers end of the problem, is the Rogers network in Manitoba appears to have been a joint venture between Rogers and MTS, prior to MTS being bought out by Bell Mobility. Now that Bell has taken control of MTS, it sounds like Bell realized a lot of the MTS equipment was outdated, and has been attempting upgrades, which seem to be causing more problems than what they're worth. A co-worker is with MTS, and has been having a heck of a time with all of his services from MTS, and the technician's he's spoken to have led on to some deeper issues than what he's seeing. I would imagine that since the agreement was between Rogers and MTS originally, that Bell will have to honor that agreement for at least some time, which (to me) says that my HSPA data slowness could be due to Bell attempting to update the shared hardware between MTS and Rogers.
nightauthor said:
I've tried flashing US Unlocked, was prompted for a sim unlock code when I put a Verizon sim in my Tmobile phone.
So I tried flashing Verizon firmware, it told me that my verizon sim... was not a verizon sim.
Did the modem reset, didnt make a difference. Not sure what else to try.
Click to expand...
Click to collapse
I'm not sure that flashing the VZW firmware would write to RFG_8 (the simlock partition)... If that simlock partition hasn't been rewritten, you're phone is likely still locked to T-Mobile, but with no way to unlock it though the VZW firmware since AFAIK T-Mobile uses an app to remove the simlock. The modem reset would only reset the parameters of the modem, not remove the sim lock...

Related

Hello!

Hello
I just wanted to say HI. I just registered. Been exploring this site for some time now. I have the touch pro 2. I really like it. I have had a lot of phones, mostly iphones and blackberries (I used to sell them). Done a lot of unlocking, but now am getting into serious business
So just wanted to say Hi. Thanks for helping me get an education. I will say this information is very hard to navigate though. You guys are amazingly smart about this stuff.
So far I have the MightyROM. Trying to understand the different types of locks/locking. For the TP2. From Iphones I learned about basebands and firmwares. This TP2 is on a whole new level by comparison though. Very confusing. Trying to skim through the wiki. Information seems hard to come by. I have basic knowledge only pretty much, but it's all diverse (done light java programming, etc...)
Really interested in the Registry edit capabilities. Right now I just have Rescoe. I thought for sure there would be a way to unlock by going that route but doesn't seem to work on anything I have tried. Don't really understand the parameters/keys and don't know how exactly to find out.
I will just keep plugging away I guess. Tried to buy the security unlocker but ran into problems with paypal freezing my account and what not... I really hate paypal...
Thanks though. You guys do great things!
What is Security Unlock?
Ok hello again, I now have a very good question I think:
What is Security Unlocking?
I was reading the wiki and that clarified a lot of things for me as far as CID/ROM unlocking and SIM unlocking but I didn't see anything about security unlocking. I am under the impression that I need to security unlock but I don't know why and I would really like to know.
Last nite I tried to download and install the radio upgrades from Olipro but the phone bricked into bootloader and I had to reflash the mighty ROM to get it back up and running again. As my understanding is that I am currently CID/ROM unlocked but I can't seem to unlock the Radio/GSM without Security unlocking. Can please tell me why? Is this an added mechanism to prevent this that is recent advancement on the carriers part I am guessing but how does it work and why? Thanks so much if you tell me!!!
derekstaroba said:
Ok hello again, I now have a very good question I think:
What is Security Unlocking?
I was reading the wiki and that clarified a lot of things for me as far as CID/ROM unlocking and SIM unlocking but I didn't see anything about security unlocking. I am under the impression that I need to security unlock but I don't know why and I would really like to know.
Last nite I tried to download and install the radio upgrades from Olipro but the phone bricked into bootloader and I had to reflash the mighty ROM to get it back up and running again. As my understanding is that I am currently CID/ROM unlocked but I can't seem to unlock the Radio/GSM without Security unlocking. Can please tell me why? Is this an added mechanism to prevent this that is recent advancement on the carriers part I am guessing but how does it work and why? Thanks so much if you tell me!!!
Click to expand...
Click to collapse
what do you mean by trying to unlock the radio? SIM unlock?
security unlock allows flashing non-stock radios. (but you must pay attention if you're flashing a radio that's compatible with your phone model.)
cmonex said:
what do you mean by trying to unlock the radio? SIM unlock?
security unlock allows flashing non-stock radios. (but you must pay attention if you're flashing a radio that's compatible with your phone model.)
Click to expand...
Click to collapse
Well I'm not quite sure but I will explain what I am seeing.
When I put a SIM in the network doesn't register but it shows the new phone number in phone settings on the first tab. On the second tab in 'Network' it doesn't detect and keeps saying "searching for network" etc...
My radio says WF. the hhspl works fine and I can flash any ROM. The only ROM I haven't tried is a GSM ROM because in my understanding that bricks the phone (What is the brick? Tricolor? Black screen?). However I haven't been able to flash any Radio's at all. It gets to 100% and then quits with an error and reverts the phone to tricolor screen and the only way to get it out is to Reflash a ROM. I was able to Flash a Sprint ROM with the windows mobile 6.1 version. I have to say that one really sucks lol but it did manage to change the radio version. After I changed the Radio Version to 1.96WF I reflashed back to MightyROM and tried to run the unlocker again, didn't work. Then I tried to reflash another radio. Didn't work and bricked the phone to tricolor/bootloader again.
So am I CID locked Or Security locked? Either way the process should work I thought? None of the programs seem to be doing what they are fully designed to do.
Thnx a bunch!
Something!
I purchased a brand new T-Mobile SIM and IT REGISTERED!
I was able to call the T-Mobile Help line.
There was some trouble with the activation, but I think I got it. I guess I didn't need the security unlock after all???
weird. And the radio version is sprint. In my understanding, a sprint baseband/radio is not supported on T-mobile, yet I have access to the frequencies/bands. For example on an iphone in order to pick up frequencies from T-mobile or any other GSM carrier you have to upgrade the baseband/radio version to one that supports those frequencies. The last iphone I had I had to use an IPAD baseband in order to unlock it. So this is completely different.
THIS MAKES ME VERY VERY CURIOUS!
Yea the security unlocker doesn't work for the U.S. Cell version... at least mine it doesn't. I made some youtube videos and a thread to show that. I figured out another way to unlock though using the HardSPL, Flashing to a Sprint Stock ROM to get that radio, and then flashing again to MightyROM.
What I meant by unlocking the radio is basically I am thinking of the radio in terms of the radio picks up certain signals (like 800mhz, 850mhz, 1900mhz, etc...) but each carrier prevents their radios from picking up all but one of the signal, the one they use, and prevents the rest from communicating with the device (guessing this would be the device modem?) so when I say "unlock Radio" I was meaning unlock those other frequencies and get rid of the programming which blocks them and use my device to full capability.
So now I get to see what this baby can really do thanks
derekstaroba said:
Well I'm not quite sure but I will explain what I am seeing.
When I put a SIM in the network doesn't register but it shows the new phone number in phone settings on the first tab. On the second tab in 'Network' it doesn't detect and keeps saying "searching for network" etc...
My radio says WF. the hhspl works fine and I can flash any ROM. The only ROM I haven't tried is a GSM ROM because in my understanding that bricks the phone (What is the brick? Tricolor? Black screen?). However I haven't been able to flash any Radio's at all. It gets to 100% and then quits with an error and reverts the phone to tricolor screen and the only way to get it out is to Reflash a ROM. I was able to Flash a Sprint ROM with the windows mobile 6.1 version. I have to say that one really sucks lol but it did manage to change the radio version. After I changed the Radio Version to 1.96WF I reflashed back to MightyROM and tried to run the unlocker again, didn't work. Then I tried to reflash another radio. Didn't work and bricked the phone to tricolor/bootloader again.
So am I CID locked Or Security locked? Either way the process should work I thought? None of the programs seem to be doing what they are fully designed to do.
Thnx a bunch!
Click to expand...
Click to collapse
if you only flashed Hard-SPL, then you are still security locked in terms of radio.
Hard-SPL is only designed to unlock the SPL, not the radio. so, it does do what it was designed to do, unlocks your phone for normal ROM flashing.
derekstaroba said:
Yea the security unlocker doesn't work for the U.S. Cell version... at least mine it doesn't. I made some youtube videos and a thread to show that. I figured out another way to unlock though using the HardSPL, Flashing to a Sprint Stock ROM to get that radio, and then flashing again to MightyROM.
What I meant by unlocking the radio is basically I am thinking of the radio in terms of the radio picks up certain signals (like 800mhz, 850mhz, 1900mhz, etc...) but each carrier prevents their radios from picking up all but one of the signal, the one they use, and prevents the rest from communicating with the device (guessing this would be the device modem?) so when I say "unlock Radio" I was meaning unlock those other frequencies and get rid of the programming which blocks them and use my device to full capability.
So now I get to see what this baby can really do thanks
Click to expand...
Click to collapse
both Hard-SPL and our sim/security unlocker (separate program from Hard-SPL) work for US cellular tp2.
as for the Tmobile SIM, some of the newer SIM cards will work with that sprint radio. not all of these SIM cards will.

[Q] Canadian Virgin WFS

Anyone unlock one of these? I seem to remember reading somewhere a few months back Bell (who now owns virgin) saying they will never unlock it.
However I see that there are "WWE" branded unlocks for my version, wtf?
Here is the url of the exact phone I have - http://www.virginmobile.ca/en/phones/phone-details.html?model=HTCWILD&colour=White
Please no "I unlocked my DerpCellular wfs, you can too!!" stupidity that most of these threads digress into, either you have the exact phone or not. Anyone who lives in Canada and deals with Bell will understand why this needs to be asked
Hey, another virgin canada user.
i have that exact phone (same colour too) with virgin. Mine unlocked just fine via the htcdev unlock. You just need to select the "Bell Mobility WWE" RUU when unlocking it.
unlocked and rooted. bye bye useless bell apps.
be sure to notice that the unlock does a factory reset. back your stuff (contacts!) up before you start on it.
So when you say unlocked using the DEV tool, does that mean its network and sim unlocked? Also just curious, I have a Bell SIM card, can I use this in this phone without unlocking the network/sim?
jhong88 said:
So when you say unlocked using the DEV tool, does that mean its network and sim unlocked? Also just curious, I have a Bell SIM card, can I use this in this phone without unlocking the network/sim?
Click to expand...
Click to collapse
nope, the htcdev bit only unlocks the bootloader. the sim lock and all the other bits of s-on remain in place. you'll need an xtc clip or an unlock code if you want the ditch the network shackles.
as for the virgin->bell, no idea. there seems to be conflicting information on whether bell/virgin sims are interchangeable or not. some people report it works, other report it doesn't.
compro01 said:
Hey, another virgin canada user.
i have that exact phone (same colour too) with virgin. Mine unlocked just fine via the htcdev unlock. You just need to select the "Bell Mobility WWE" RUU when unlocking it.
unlocked and rooted. bye bye useless bell apps.
be sure to notice that the unlock does a factory reset. back your stuff (contacts!) up before you start on it.
Click to expand...
Click to collapse
Excellent, I was NOT expecting to be able to do this.
And now for a stupid question, what is a good way to back everything up for a quick reinstall?
AFAIK, There isn't one really, other than exporting your contacts and writing down all your apps names, as all the real useful backup methods require root.
OTOH, unless you like customizing extensively, it should only take a day or two to get things back to normal.
sent from my rooted wildfire s

Updating att branded phone t-mobile

I have an s-offed att branded phone on t-mobile. It's running an old ruu t-mobile. I just downloaded an update to lollipop. I can just run the update?
Possibly...
you need to check a few things... what's your phone's cid set to? (you can see this in your boot loader screen).
As a general rule, I've found that if I run t-mobile radio's I have more problems than if I run either a native AT&T or the DEV edition radio and then t-mobile firmware on-top of that radio... my phone doesn't seem to do some of the hspa bands from t-mobile...
check your cid, before you do much of anything else...
If he's running a tmo ruu, i would assume he's running super cid.
I would also have to assume that he's changed the mid to tmo?
scifan, have you considered using DFS to set your bands?
avg2424 said:
.
changed the mid to tmo?
DFS to set your bands?
Click to expand...
Click to collapse
What is the mid and DFS?
I have a Verizon branded m8 and am using a t-mobile mvno
(straight talk) SIM. I am considering changing RoMs from viper one to one off if the t-mobile thread in order to solve this problem of random service disconnections. Should I switch to a different Ruu? Should I have changed the RUU when I was on stock?
I apologize if the this should be on another or is own thread.
Thanks so much!
kyedmipy said:
What is the mid and DFS?
I have a Verizon branded m8 and am using a t-mobile mvno
(straight talk) SIM. I am considering changing RoMs from viper one to one off if the t-mobile thread in order to solve this problem of random service disconnections. Should I switch to a different Ruu? Should I have changed the RUU when I was on stock?
I apologize if the this should be on another or is own thread.
Click to expand...
Click to collapse
DO NOT, repeat DO NOT try to "convert" your Verizon M8 to T-Mob (with T-Mob RUU). The partitioning (possibly hardware) is different. The T-Mob RUU won't work, and may result in a permanent radio brick.
I'm not sure what is causing the service disconnects. Does the issue occur if you only use 2G and 3G? You may consider looking at enabling the proper LTE bands used by T-Mobile. From what I see, the Verizon M8 supports the proper bands that T-Mob uses for 2G and 3G. However, the VZN version only supports one of the two LTE bands (Band 4) used by T-Mob (Bands 4 and 17). Enabling LTE band 17 may or may not help. The missing support for LTE Band 17 may be related to your disconnect issues, but that's just a theory.
The hitch here, is that trying to enable LTE Band 17 requires s-off, which costs $25 by sunshine app (if you are not already s-off). And its not a sure solution, so may be money wasted.
You can take a look at the following threads, on how to enable bands on the Verizon M8. But I don't personally vouch for these:
http://forum.xda-developers.com/htc-one-m8/general/how-to-convert-cdma-m8-sprint-vzw-gsm-t3303812
http://forum.xda-developers.com/htc-one-m8/general/unlock-bands-qualcomm-device-phone-t2880239
Awesome thanks. I paid the 25 dollars for s-off already to root the phone. Sunshine works like a charm.
I'll check out the links you provided. I have a feeling your theory is correct. You described how I felt the problem was but lacked the knowledge to produce words to describe. Thanks again.
I don't know whether this is the right thread to ask this question but if you do know kindly advise me; i recently bought a T-mobile M8 which was imported from USA and had sim unlocked but i don't know other details except that its not rooted (that i checked with supersu). May be it was imported as scrap since it's an old model and may be it was unlocked from t-mobile, i just have no idea. Now the phone is asking me for a few updates which describe to tell me that these are intended to prepare phone for marshmallow update (currently it's on jellybean). Should i allow update to progress or not? i don't want to loose sim unlock.
I recently bought a T-mobile M8 which was imported from USA and had sim unlocked but i don't know other details except that its not rooted (that i checked with supersu). May be it was imported as scrap since it's an old model and may be it was unlocked from t-mobile, i just have no idea. Now the phone is asking me for a few updates which describe to tell me that these are intended to prepare phone for marshmallow update (currently it's on jellybean). Should i allow update to progress or not? i don't want to loose sim unlock.

HTC 10 Unlocked, Used Sunshine for Verizon, Changed CID/MID, Process back 2 Unlocked?

Hey all...
I used sunshine to unlock and s-off immediately after purchase of my Unlocked HTC 10 and changed the CID/MID to make it a Verizon phone and flash ViperRom.
Now that I'm traveling for work I need to change the phone back to Unlocked to use the LTE bands in another country (buying a SIM card in Japan), and also for it to to work back on VZN when I return.
I'd really appreciate it if someone can point me in the right direction of the steps I need to take to perform this? Hoping I only need to change/flash a couple things to pop in a new SIM in Japan and pop back in the VZN SIM when I'm back.
Thanks all! Hopefully this could be useful for someone else in my situation. I'd venture to guess it's somewhat common...
-Josh
finger11 said:
Hey all...
I used sunshine to unlock and s-off immediately after purchase of my Unlocked HTC 10 and changed the CID/MID to make it a Verizon phone and flash ViperRom.
Now that I'm traveling for work I need to change the phone back to Unlocked to use the LTE bands in another country (buying a SIM card in Japan), and also for it to to work back on VZN when I return.
I'd really appreciate it if someone can point me in the right direction of the steps I need to take to perform this? Hoping I only need to change/flash a couple things to pop in a new SIM in Japan and pop back in the VZN SIM when I'm back.
Thanks all! Hopefully this could be useful for someone else in my situation. I'd venture to guess it's somewhat common...
-Josh
Click to expand...
Click to collapse
I've used my VZW 10 in Japan with a local data sim card without issues. Check the operator you're interested in over there and make sure your VZW 10 covers those bands. Else choose a different operator. Also your network settings need to be set to Global instead of CDMA, if I remember correctly.
With that said if you still want to convert back to Unlocked to be safe, just change your CID to Unlocked (or even superCID) and run an unlocked ruu from htc.com. This will wipe your phone so back everything up. Then once you're back home, do the reverse using one of the no-wipe ruus on xda. I would have thought you'd be comfortable with this already since you've done it once before. Am I misreading your question?
One piece of advice, if you chose a data-only simcard there from the provider Docomo (largest one in Japan I think) or one of their subtiers, you will likely have battery drain issues due to your phone constantly looking for a cell/voice call connection with the towers. There is a fix for it but only if you have Xposed installed.
http://www.japanmobiletech.com/2013/08/improved-fix-for-docomo-mvno-data-only.html?m=1
Tarima said:
I've used my VZW 10 in Japan with a local data sim card without issues. Check the operator you're interested in over there and make sure your VZW 10 covers those bands. Else choose a different operator. Also your network settings need to be set to Global instead of CDMA, if I remember correctly.
With that said if you still want to convert back to Unlocked to be safe, just change your CID to Unlocked (or even superCID) and run an unlocked ruu from htc.com. This will wipe your phone so back everything up. Then once you're back home, do the reverse using one of the no-wipe ruus on xda. I would have thought you'd be comfortable with this already since you've done it once before. Am I misreading your question?
One piece of advice, if you chose a data-only simcard there from the provider Docomo (largest one in Japan I think) or one of their subtiers, you will likely have battery drain issues due to your phone constantly looking for a cell/voice call connection with the towers. There is a fix for it but only if you have Xposed installed.
http://www.japanmobiletech.com/2013/08/improved-fix-for-docomo-mvno-data-only.html?m=1
Click to expand...
Click to collapse
Fantastic info, I appreciate it. I was looking at b-mobile (http://www.bmobile.ne.jp/english/index.html) because it would fit what I need (5GB/21 days/$30) but noticed the bands for them aren't supported by the VZW 10.
What company did you use?
Running an unlocked ruu from htc.com will basically make it a stock unlocked htc 10?
Another option is just getting a mobile hotspot for a bit more money and then can use my current rom... (http://www.globaladvancedcomm.com/pocketwifi.html)
finger11 said:
Fantastic info, I appreciate it. I was looking at b-mobile (http://www.bmobile.ne.jp/english/index.html) because it would fit what I need (5GB/21 days/$30) but noticed the bands for them aren't supported by the VZW 10.
What company did you use?
Running an unlocked ruu from htc.com will basically make it a stock unlocked htc 10?
Another option is just getting a mobile hotspot for a bit more money and then can use my current rom... (http://www.globaladvancedcomm.com/pocketwifi.html)
Click to expand...
Click to collapse
I bought it from some stand at Narita airport called Telecomsquare. I just shopped around the many stands until I found a package I liked and which worked. Oddly enough the shop specifically said they don't support HTC phones, because of bands I think, but I still went with it and it worked.
Yes if your device is originally U.S Unlocked then changing your cid and mid back to unlocked and flashing ruu will work. You may need to wipe your radios after flashing the ruu as well to get rid of any Verizon radio settings.
Mobile hotspot is probably the simplest option if you're willing to pay for it. No need to fiddle around activating a sim card in a foreign airport

T-Mobile HTC 10 to Verizon (Straight Talk)

So I recently moved to a rural part of Ohio, and Verizon is about the only carrier that works here. I have an HTC 10 T-Mobile variant that I Sunshine S-Off'ed and flashed to an HTC branded phone. T-Mobile just game me my SIM Unlock code, and the phone does recognize the new Verizon Sim card. However there is no service at all. So do I still need to flash a firmware?
I really need this to operate on VZW service instead of T-Mobile.
Anyone successfully done this? IS it simple and I'm just missing something?
Thanks in advance.
scothern99 said:
So I recently moved to a rural part of Ohio, and Verizon is about the only carrier that works here. I have an HTC 10 T-Mobile variant that I Sunshine S-Off'ed and flashed to an HTC branded phone. T-Mobile just game me my SIM Unlock code, and the phone does recognize the new Verizon Sim card. However there is no service at all. So do I still need to flash a firmware?
I really need this to operate on VZW service instead of T-Mobile.
Anyone successfully done this? IS it simple and I'm just missing something?
Thanks in advance.
Click to expand...
Click to collapse
You'll need to have the verizon radio running on it. You could just flash that, as mentioned here:
https://forum.xda-developers.com/verizon-htc-10/how-to/vzw-how-to-unlocked-model-vzw-t3376743
In that case you may also need to reset your radio settings to get full service, and it's also described in that thread.
Or, better in my opinion, change your cid and mid and flash the verizon ruu.
Tarima said:
You'll need to have the verizon radio running on it. You could just flash that, as mentioned here:
https://forum.xda-developers.com/verizon-htc-10/how-to/vzw-how-to-unlocked-model-vzw-t3376743
In that case you may also need to reset your radio settings to get full service, and it's also described in that thread.
Or, better in my opinion, change your cid and mid and flash the verizon ruu.
Click to expand...
Click to collapse
Hey thanks! I will look at both options. I am going to use Straight Talk for the carrier since its dirt cheap. I jsut need it to operate on VZW towers.
Thanks again.
Tarima said:
You'll need to have the verizon radio running on it. You could just flash that, as mentioned here:
https://forum.xda-developers.com/verizon-htc-10/how-to/vzw-how-to-unlocked-model-vzw-t3376743
In that case you may also need to reset your radio settings to get full service, and it's also described in that thread.
Or, better in my opinion, change your cid and mid and flash the verizon ruu.
Click to expand...
Click to collapse
Do you know where I can get the instructions for the MID/CID and the RUU files? Its been a while since I changed mine. I would like to try the verizon thing first and see if it works on straight talk. IF not, I would like to be able to flash back to TMO so I at least have a working phone.
scothern99 said:
Do you know where I can get the instructions for the MID/CID and the RUU files? Its been a while since I changed mine. I would like to try the verizon thing first and see if it works on straight talk. IF not, I would like to be able to flash back to TMO so I at least have a working phone.
Click to expand...
Click to collapse
Conversion process is described here:
https://forum.xda-developers.com/verizon-htc-10/how-to/guide-convert-unlocked-to-verizon-t3380615
Verizon RUUs are found here:
https://forum.xda-developers.com/ve...rizon-official-ruu-1-19-605-9-t3377586/page85
I'd use a Nougat RUU from the above link until you're sure you're sure you wanna stick with the Verizon software. If you install the Oreo RUU, and then downgrade back to T-Mobile which is still on Nougat, you'll lose your radio and will need to to an extra step to get it back.

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