I'm at my wit's end on this. Calls stopped working the other day due to 3G disablement as far as I can tell. AT&T model unlocked and using with Simple Mobile on T-Mobile network. Calls would just say "Calling" for a long time and then eventually disconnect. I could switch to GSM and make calls again, but slow data. Simple told me to get a new SIM and when trying to activate, it shows ineligible IMEI due to no Volte it seems.
I'm trying to get that fixed, but running into various issues.
LM-G850UM
I tried to crossflash (https://forum.xda-developers.com/t/tutorial-crossflash-bypass-opid-mismatched-error.4345963/)
I flashed G850QM30c_00_NAO_US_OP_0224.kdz but it didn't ask me to change the model, so it still shows LM-G850UM software G850UM30c. IMEI is the same.
Since this didn't get calls back or Volte, I tried updating the MBN (https://forum.xda-developers.com/t/...ther-qualcomm-powered-lg-devices-too.4343655/)
Data shows 4G. Calls don't even try to connect.
I don't know what to do next and don't have much time to try to figure it out. I like the G8X, so I'm hoping there's a way to save it.
Any thoughts from the experts?
Brando81 said:
I'm at my wit's end on this. Calls stopped working the other day due to 3G disablement as far as I can tell. AT&T model unlocked and using with Simple Mobile on T-Mobile network. Calls would just say "Calling" for a long time and then eventually disconnect. I could switch to GSM and make calls again, but slow data. Simple told me to get a new SIM and when trying to activate, it shows ineligible IMEI due to no Volte it seems.
I'm trying to get that fixed, but running into various issues.
LM-G850UM
I tried to crossflash (https://forum.xda-developers.com/t/tutorial-crossflash-bypass-opid-mismatched-error.4345963/)
I flashed G850QM30c_00_NAO_US_OP_0224.kdz but it didn't ask me to change the model, so it still shows LM-G850UM software G850UM30c. IMEI is the same.
Since this didn't get calls back or Volte, I tried updating the MBN (https://forum.xda-developers.com/t/...ther-qualcomm-powered-lg-devices-too.4343655/)
Data shows 4G. Calls don't even try to connect.
I don't know what to do next and don't have much time to try to figure it out. I like the G8X, so I'm hoping there's a way to save it.
Any thoughts from the experts?
Click to expand...
Click to collapse
Make a back up,and cross flash it with T-Mobile firmware.Problem solved.
Thanks Surge!
I crossflashed to general firmware. Where's the best place for the TMobile firmware? Just off their website? Will that lock the phone again, or will I still be able to use the Simple Mobile Service?
Brando81 said:
Thanks Surge!
I crossflashed to general firmware. Where's the best place for the TMobile firmware? Just off their website? Will that lock the phone again, or will I still be able to use the Simple Mobile Service?
Click to expand...
Click to collapse
It shouldn't lock the device if it's already unlocked.You can also use G8 firmware as well.(same device)Look here,this should get you the firmware you need.
Models - LG-Firmwares.com
Free archive of LG firmwares. Comparison of features and reviews of all mobile devices. Quick download of updates for your device.
lg-firmwares.com
Thanks again, Surge.
That's where I got my KDZ before. I used the one here: https://lg-firmwares.com/lg-lmg850qm-firmwares/ and used the 3/24/22 version for Android 11. When I flashed it with LG UP, it didn't ask me to change models, which I'm not sure if that's why it didn't trigger it to start working again.
Brando81 said:
Thanks again, Surge.
That's where I got my KDZ before. I used the one here: https://lg-firmwares.com/lg-lmg850qm-firmwares/ and used the 3/24/22 version for Android 11. When I flashed it with LG UP, it didn't ask me to change models, which I'm not sure if that's why it didn't trigger it to start working again.
Click to expand...
Click to collapse
Most are using the international firmware for the G8 and G8x models.Which is what the qm firmware is.If you're carrier is T-Mobile or any T-Mobile MVNO,I would solely use T-Mobile firmware.My G8x is AT&T branded and factory unlocked,and I tried using Tmobile service about 2 months ago and was having issues sending text messages.I could place and receive calls and get text but couldn't send them period.
Yeah, so my G8X is AT&T unlocked. AT&T didn't activate VOLTE on this model, so when T-Mobile shut down their 3G network, Simple Mobile calls won't work and the current IMEI shows it's not eligible (because of the model.) At least that's my understanding so far.
So for the G8, is this the firmware I should crossflash? https://lg-firmwares.com/lg-lmg820tm-firmwares/ or I could try the QM which may or may not work. Is that correct? Basically going to the 820 firmwares instead of the 850?
Brando81 said:
Yeah, so my G8X is AT&T unlocked. AT&T didn't activate VOLTE on this model, so when T-Mobile shut down their 3G network, Simple Mobile calls won't work and the current IMEI shows it's not eligible (because of the model.) At least that's my understanding so far.
So for the G8, is this the firmware I should crossflash? https://lg-firmwares.com/lg-lmg820tm-firmwares/ or I could try the QM which may or may not work. Is that correct? Basically going to the 820 firmwares instead of the 850?
Click to expand...
Click to collapse
I would go with the T-Mobile firmware since you're on their network.It wouldn't make a difference with VoLTE enabled with an AT&T sim.Once you pull the sim,and swap it it defaults back and turns the IMS settings off until it receives the configuration from their servers.Yes,820 firmware.It at least has the higher android builds,and better security patches.Once you put T-Mobile firmware on the device it should all work regardless of IMEI.
Edit:Make a back-up.Don't forget to do that first!
OK Surge....you've been helpful and seem to know what you're doing. What did I mess up?
I followed the cross flash instructions. I flashed the 820QM firmware first, and System loaded but the touchscreen wouldn't respond. I could only use the hard phone buttons. Decided to go to what you recommended with 820TM and it wouldn't boot at all - black screen - but I could still get to QFIL and LGUP.
I reflashed 850QM and touchscreen works again and I'm back to where I started.
When I flashed 820s, It did ask me if I wanted to change model numbers this time and I said Yes. And it asked it said it was changing some partitions on the 820 loads.
I may have been working on this too late. I appreciate your help so far.
Brando81 said:
OK Surge....you've been helpful and seem to know what you're doing. What did I mess up?
I followed the cross flash instructions. I flashed the 820QM firmware first, and System loaded but the touchscreen wouldn't respond. I could only use the hard phone buttons. Decided to go to what you recommended with 820TM and it wouldn't boot at all - black screen - but I could still get to QFIL and LGUP.
I reflashed 850QM and touchscreen works again and I'm back to where I started.
When I flashed 820s, It did ask me if I wanted to change model numbers this time and I said Yes. And it asked it said it was changing some partitions on the 820 loads.
I may have been working on this too late. I appreciate your help so far.
Click to expand...
Click to collapse
I think someone else encountered this once before,and it was caused by certain manufacturering dates of the device.Some models can use 820 firmware,and some can only use 850.Looks as if yours is kind of stuck with 850 firmware only.I think the AT&T version I have I could go either way it worked with no problems.I still have my G8x but never really used it.I bought it because it came with the dual screen attachement,and $125 I took it.Here's my Sprint copy if you want to give it a try.It's a LUNS copy minus LUNS 5 for IMEI information etc.I was in the same boat as you on certain features not working with AT&T at one point myself and had to crossflash the Sprint version of the device.With that being said,try this one from LG Fans first.If that doesn't work,try my LUNS Sprint copy and let me know which ones works the best.
LG G850UM | LG G8X ThinQ | Version: G850UM30a_00_0901 | Firmware for Region: CAN from - Lg-firmwares.com
LG G850UM Download the latest version of firmware | OS Version: Android 11 R | Firmware version: G850UM30a_00_0901 | CAN - Fan club LG-firmwares
lg-firmwares.com
Sprint LG G8x Last Update - Google Drive
drive.google.com
So interesting news....I obviously didn't try making calls last night at 2AM, but apparently reflashing with the same exact 850QM software I used before seems to have fixed the issue. Maybe changing the model to 820 and then changing back to 850? Who knows? That's like the 3rd thing that happened with this process that I have no idea why it started working differently, but hey I'm happy and back up and rolling.
Thanks for all of your help, Surge! I was truly at wits end, and had already ordered a new phone, even though I'm happy with the G8X overall. Now I can return that and keep rolling with the G8X.
Thanks again, you were a huge help and its much appreciated!
Brando81 said:
So interesting news....I obviously didn't try making calls last night at 2AM, but apparently reflashing with the same exact 850QM software I used before seems to have fixed the issue. Maybe changing the model to 820 and then changing back to 850? Who knows? That's like the 3rd thing that happened with this process that I have no idea why it started working differently, but hey I'm happy and back up and rolling.
Thanks for all of your help, Surge! I was truly at wits end, and had already ordered a new phone, even though I'm happy with the G8X overall. Now I can return that and keep rolling with the G8X.
Thanks again, you were a huge help and its much appreciated!
Click to expand...
Click to collapse
Glad you got it working!I run in to a same similar issue with a Note 8 I have,and it being an international unlocked AT&T phone.No calls would work period,and swapped firmware over and over and finally started to give up and flashed the stock firmware back and it worked.It's something that hangs in Android with the changed IMS settings that are sent to the device.It's all odd at the moment with carriers,but nothing surprises me anymore..lol..
"G850QM30c_00_NAO_US_OP_0224.kdz" Is a BPT kdz and is not truly open even though it says, "NAO US OP".
I got the phone working by using "G850QM30b_00_NAO_US_OP_0902.kdz", the "real" open kdz. Everything worked fine after that.
BereiBlue said:
"G850QM30c_00_NAO_US_OP_0224.kdz" Is a BPT kdz and is not truly open even though it says, "NAO US OP".
I got the phone working by using "G850QM30b_00_NAO_US_OP_0902.kdz", the "real" open kdz. Everything worked fine after that.
Click to expand...
Click to collapse
Can someone please explain to me the different versions of the firmware
BPT and CCT and USA
are they really different
there is also the 40A now which is android 12?
G850QM40b_00_NAO_US_OP_0805.kdz
https://lg-firmwares.com/lg-lmg850qm-firmwares/
most of these firmwares are are 4GB in size, the newer KDZ are just 1GB
G850QM30c_00_NAO_US_OP_0224.kdz
My ATT G8X just got the update to G850QM40A which is android 12
how is android 12? do the firehose , root and bootloader unlock apply
doctorman said:
Can someone please explain to me the different versions of the firmware
BPT and CCT and USA
are they really different
there is also the 40A now which is android 12?
G850QM40b_00_NAO_US_OP_0805.kdz
https://lg-firmwares.com/lg-lmg850qm-firmwares/
most of these firmwares are are 4GB in size, the newer KDZ are just 1GB
G850QM30c_00_NAO_US_OP_0224.kdz
My ATT G8X just got the update to G850QM40A which is android 12
how is android 12? do the firehose , root and bootloader unlock apply
Click to expand...
Click to collapse
Yes,the firehose will always work regardless of the Android version.Also from what I have read,yes the same procedures work for A12 for root and unlocking the bootloader.As always,backup your firmware before rooting and attempting to unlock the bootloader just in case something goes wrong!
Surgemanxx said:
Yes,the firehose will always work regardless of the Android version.Also from what I have read,yes the same procedures work for A12 for root and unlocking the bootloader.As always,backup your firmware before rooting and attempting to unlock the bootloader just in case something goes wrong!
Click to expand...
Click to collapse
Do you think there is any point to crossflash
USA G850QM40b_00_NAO_US_OP_0805.kdz
on ATT G8X to be used on Tmobile network? I can do the VOLTE patch after rooting it . is it worth the headache?
doctorman said:
Do you think there is any point to crossflash
USA G850QM40b_00_NAO_US_OP_0805.kdz
on ATT G8X to be used on Tmobile network? I can do the VOLTE patch after rooting it . is it worth the headache?
Click to expand...
Click to collapse
QM versions are international unlocked versions of the firmware.My branded AT&T G8x had issues sending text messages with T-Mobile service I do remember.I crossflahed my variant with the QM version and it worked flawless after that.But,I do have a full backup copy of the AT&T firmware if I ever decide to put it back.
Surgemanxx said:
QM versions are international unlocked versions of the firmware.My branded AT&T G8x had issues sending text messages with T-Mobile service I do remember.I crossflahed my variant with the QM version and it worked flawless after that.But,I do have a full backup copy of the AT&T firmware if I ever decide to put it back.
Click to expand...
Click to collapse
May I ask how did you back it up?
also if I have androind 11 ATT can I crossflash to android 12? that should not be an issue right?
the partitioning is not changed in the update?
Related
Hi, could I flash the t-mobile firmware file or rom to the verizon lg g5? I switched to t-mobile, and am able to use the verizon phone, but lte drops to 3g for calls and lots of the time data shows up as hspa when I check the icon. If it can be done, please explain how. Thanks in advance.
No you can't flash the T Mobile firmware.
other firmwares beeing flashed on different lg g5's
So, there is no way to flash different firmwares on the verizon model, just other ones. Is this because the bootloader is locked? How can people flash a different region firmware on some of the models?
I to am curious on this, i have called LG and was told that the only difference between the T-Mobile and the Verizon LG G5, was software based, and that their was no hardware differences at all.
If that is true, why would we not be able to flash the T-Mobile rom onto our verizon phone?
DO NOT ATTEMPT THIS OR YOU WILL BRICK YOUR PHONE BEYOND ANY REPAIR. It has been said MANY times before, google it first
gigawatt said:
Hi, could I flash the t-mobile firmware file or rom to the verizon lg g5? I switched to t-mobile, and am able to use the verizon phone, but lte drops to 3g for calls and lots of the time data shows up as hspa when I check the icon. If it can be done, please explain how. Thanks in advance.
Click to expand...
Click to collapse
The hardware is essentially different... Has nothing to do with locked bootloader, u could still use LGUP to flash regardless but it would likely brick your phone. Drops to 3g because of the bands used, there may be a workaround but it's unlikely.
Hi to all!
This is my first post here.
Couple days ago i purchased LG v10 (F600L) with 64GB of ROM! This is korean model from network U+.
I live in Croatia so I can't use some features from phone, and it's not the major problem.
I wonder if is possible to flash phone with H960 firmware? Via LGUP app from my PC? Is it problem because my phone has no unlocked bootloader and in some posts on the internet I readed I can brick up my phone.
4G does not work either. Probably only korean version of LTE, not supported in Croatia.
So, if I do firmware upgrade via LGUP, with euro-version, will I get phone with only 32GB, will LTE bands be opened to euro-networks?
I didn't say that I can't upgrade my korean version to Android 6.0, via OTA or LG Bridge. It says Cannot check the latest firmware.
So, guys, to do it or stay out of any attempting?
Thanks and regards from Dubrovnik!
Is it true that noone knows?
Cannot, ne mozes! Just try to read a little more about it.
If you click the link you can see there is support for 4G in Croatia.
https://www.frequencycheck.com/compare-devices/ynatK8/lg-v10-h961n/lg-v10-h962
Pozdraviti iz Thailanda
I can see Croatian operators can offer me LTE 1800mHz only.
So, in suburbs of croatian big cities I have LTE, but only in streets, outside places etc. Whei I enter in some bar or restaurant, LTE wanishes.
I'm on VIPnet Croatia which provides LTE 800/1800. It seems my Korean V10 works only on 1800.
Too bad. Cause, it's good phone. I upgraded recently to Android 6.0 (MM) via link on this forum and it works even better than on 5.1.
On posts on this forum(s) I can see that my device cannot be flashed with another firmware. I've downloaded Turkish version (64GB) but LG UP says Error. It seems I have to root my device, but even than, it's not for sure that all LTE bands will working.
Koreans made the mess by locking with brandings their devices.
@moby77: for what I know, you can't flash a different firmware... a brick is nearly assured.
But you can try this code: 5457#*600# then go to Multi Band Selection and check LTE bands that are available in your Country.
Don't know if that procedure works in your device, but it well worth a try!
moby77 said:
Hi to all!
So, if I do firmware upgrade via LGUP, with euro-version, will I get phone with only 32GB, will LTE bands be opened to euro-networks?
Click to expand...
Click to collapse
I am not sure but most probably flashing wrong firmware will brick the phone. However, one thing I am sure is just flashing the firmware on different version never unlocks the bands of 3G/LTE. These bands cannot be unlocked this way. If F600L does not support a particular band in your country, it will not run LTE no matter what firmware you flash.
F600L is very well locked by Koreans so I san't do anything except flashing new kind of firmware, but one provided from U+ network.
One day I got mad, so I used LG UP, downloaded firmware for Turkish H960, and pressed Start button (it really was pissed off so even I bricked phone, my fault. Totaly insane, but...). After 4% od doing "something" it said Error, cannot flash firmware! (or something like this).
Official os
you have H901-10c official os bcz when i upgred using LGUP my phone is not starting as well as not showing charging sign when i am connect my charger
I'm looking for the latest USA factory unlocked firmware for the Stylo 4 (KDZ file), does anyone know where I can find that? I have looked everywhere I can think of and everyone has carrier specific firmware, but not the one I am looking for.
The specific model is LMQ710ULM.AUSABK.
The IMEI is: 357183090498307
Try This
SpikeyPsyche said:
I'm looking for the latest USA factory unlocked firmware for the Stylo 4 (KDZ file), does anyone know where I can find that? I have looked everywhere I can think of and everyone has carrier specific firmware, but not the one I am looking for.
The specific model is LMQ710ULM.AUSABK.
The IMEI is: 357183090498307
Click to expand...
Click to collapse
Hi there,
I would like to know which specific carrier that your looking for.
Sincerely
KIBS2173
KIBS2173 said:
Hi there,
I would like to know which specific carrier that your looking for.
Sincerely
KIBS2173
Click to expand...
Click to collapse
It is the unlocked model sold directly by LG in the USA, so it is non-carrier firmware.
Try This
SpikeyPsyche said:
It is the unlocked model sold directly by LG in the USA, so it is non-carrier firmware.
Click to expand...
Click to collapse
Hi there,
You can try this website.
https://lg-firmwares.com/
or
https://lg-firmwares.com/lg-lmq710ulm-firmwares/#tab=firmwares
since your phone is network unlocked I think it might be safe to reinstall the firmware.
However, if you have your doubts feel free to search it online or ask LG directly.
Sincerely
KIBS2173
KIBS2173 said:
Hi there,
You can try this website.
https://lg-firmwares.com/
or
https://lg-firmwares.com/lg-lmq710ulm-firmwares/#tab=firmwares
since your phone is network unlocked I think it might be safe to reinstall the firmware.
However, if you have your doubts feel free to search it online or ask LG directly.
Sincerely
KIBS2173
Click to expand...
Click to collapse
Thank you. I found out that they never released the KDZ for the factory unlocked phones (region USA). So, the only way to update my phone would be to flash carrier firmware, which, is kinda risky, since it would technically be a crossflash. I would likely lose certain features, such as Wi-Fi calling and/or VoLTE. One of the few firmwares that supports wi-fi calling is the T-Mobile firmware, but I wouldn't flash that firmware because it is different than the hardware of my phone (their model has 2 GB of RAM, mine has 3 GB of RAM, etc...
Try This
SpikeyPsyche said:
Thank you. I found out that they never released the KDZ for the factory unlocked phones (region USA). So, the only way to update my phone would be to flash carrier firmware, which, is kinda risky, since it would technically be a crossflash. I would likely lose certain features, such as Wi-Fi calling and/or VoLTE. One of the few firmwares that supports wi-fi calling is the T-Mobile firmware, but I wouldn't flash that firmware because it is different than the hardware of my phone (their model has 2 GB of RAM, mine has 3 GB of RAM, etc...
Click to expand...
Click to collapse
Hi there,
Yes, while I was researching it online I found two firmware for this phone for the US region. But anyways have you tried using a PC suite from LG to reinstall the firmware. Or have you tried going on to the recovery mode and just reset the whole device. Or better try to install a custom ROM, to be honest I think it might be okay if you flashed a Europe region firmware, but make sure you back up the current firmware. I flashed a Samsung phone which was used to be locked and then I unlocked it after that I flashed the carrier firmware and it didnt carrier locked my phone. But anyways try your best.
Sincerely
KIBS2173
Hello, looking for some help to see if anyone can help me find the firmware of my A526U specifically for AT&T? I have moved my phone over from TMobile where I purchased it from, and am looking to re-flash it to AT&T. Was working fine for a few months, now I'm no longer able to make or receive calls.
After inserting the new AT&T SIM card, the TMobile splash screen still shows up. The Service Provider software version reflects TMobile still as well and I'm concerned that for whatever reason the phone did not fully update after inserting the new SIM. I spent 2 hours on the phone with AT&T support after the store said they couldn't help me. Pulled the SIM card out, restarted phone, put it back in, reset network settings etc. I've searched sammobile and I cannot find the AT&T firmware, only TMobile, Sprint, and TMK. I would sincerely be greateful please if anyone could help me by pointing me in the right direction for the firmware for this model phone.
AT&T doesn't make their firmware available publicly - for any device. I have a source who can get me Samsung firmware for any USA device - even AT&T. But he charges me for each one
I appreciate the quick response! Is there any option I have here? Could I try flashing a "U1" firmware to his phone then? He's currently on A526USQS4CVA6. I actually found your other post as I was also working on my note 10 plus - https://forum.xda-developers.com/t/n975u-and-n975u1-firmware-links-here.3957648/. If I'm reading that correctly, I should be able to correct? If so, how can I tell if the version I'm downloading is "downgrading the bootloader"
aschaffer35 said:
I appreciate the quick response! Is there any option I have here? Could I try flashing a "U1" firmware to his phone then? He's currently on A526USQS4CVA6. I actually found your other post as I was also working on my note 10 plus - https://forum.xda-developers.com/t/n975u-and-n975u1-firmware-links-here.3957648/. If I'm reading that correctly, I should be able to correct? If so, how can I tell if the version I'm downloading is "downgrading the bootloader"
Click to expand...
Click to collapse
1. Yes, you can try flashing U1 if you want
2. You can't "downgrade the bootloader" - Odin won't let you.
3. In A526USQS4CVA6, "4" is the position of the bootloader level/revision/binary. Make sure that whatever U1 firmware you download also has a 4 in that spot and you'll be fine. (Or just get the firmware from Frija or one of the other similar firmware download tools, because those throw you whatever the newest version is automatically)
iBowToAndroid said:
1. Yes, you can try flashing U1 if you want
2. You can't "downgrade the bootloader" - Odin won't let you.
3. In A526USQS4CVA6, "4" is the position of the bootloader level/revision/binary. Make sure that whatever U1 firmware you download also has a 4 in that spot and you'll be fine. (Or just get the firmware from Frija or one of the other similar firmware download tools, because those throw you whatever the newest version is automatically)
Click to expand...
Click to collapse
Thank you very much sir! I shall give this a go this weekend! You guys rock!
My AT&T N10+ N975U is running on Pie. It transitioned seamlessly with no changes made on my end. It was already using 4G VoLTE though. Same sim card.
I would contact AT&T advanced tech support as there may be an easier way.
4G VoLTE needs to be enabled in hidden settings.
blackhawk said:
My AT&T N10+ N975U is running on Pie. It transitioned seamlessly with no changes made on my end. It was already using 4G VoLTE though. Same sim card.
I would contact AT&T advanced tech support as there may be an easier way.
4G VoLTE needs to be enabled in hidden settings.
Click to expand...
Click to collapse
Your AT&T phone? So it's originally an AT&T model that you're still using with them? That's not the same situation that the OP is in
iBowToAndroid said:
Your AT&T phone? So it's originally an AT&T model that you're still using with them? That's not the same situation that the OP is in
Click to expand...
Click to collapse
The U is the AT&T variant vs the U1 which is the unlocked variant, correct?
blackhawk said:
The U is the AT&T variant vs the U1 which is the unlocked variant, correct?
Click to expand...
Click to collapse
Yup. But OP has a T-Mobile model that they moved to AT&T. There's also no guarantee that a Note 10+ will work the exact same way as an A52. You're also running 3 year old firmware, while OP is fully updated.
So i don't see the correlation.
iBowToAndroid said:
Yup. But OP has a T-Mobile model that they moved to AT&T. There's also no guarantee that a Note 10+ will work the exact same way as an A52. You're also running 3 year old firmware, while OP is fully updated.
So i don't see the correlation.
Click to expand...
Click to collapse
The old firmware works fine on 4G VoLTE... that's likely not the issue. What is the issue is it wasn't running on 4G VoLTE so it's likely the settings and sim card need updating not the firmware.
Hi All, thought I would provide an update... After spending hours on the phone with AT&T support this week and being frustrated with the AT&T store, I decided to proceed forward with flashing the U1 version. What started this all was last week my son could no longer make or receive calls on his AT&T A52 phone (we ported it from TMobile September 2021). The store and AT&T advanced tech support said there were issues with people's BYOD devices, even though the A526U and A526U1 shows on the supported devices list. The store rep said he's been getting people in left and right that can't make or receive calls, and all they can do is upsell customers to an AT&T branded phone.
SO... my son's phone was on A526USQS4CVA6. Startup screen showed TMobile still, even with the AT&T SIM card in it. I proceed to flash the A526U1OYM4CVB2_ATT that I found from Sammobile. Was hoping someone had just the "U" version but I couldn't find this anywhere. When doing the flash, I used the Home_CSC file (I had to download a patched version of ODIN as it was stuck as setting up connection) and when it finished it would just keep going back to the download screen on the phone and I freaked out. I did some more research and decided to flash again using CSC instead of Home.CSC (I did a backup using smart switch on my PC luckily). This WORKED! I'm guessing because the software version he was on was different than what I was trying to flash too so maybe this is why I needed the CSC for a clean flash (there was no user data file that downloaded from SAMMOBILE).
Now, calls are working on my son's phone again! AND his service provider software version now reflects ATT vs TMB! Man this has been one heck of a journey lol. I've seen numerous forums on google of people having the same trouble with me, their BYOD devices not working. Seems a flash of U1 worked for me, so hopefully this helps others out there!
Hello
I got this tablet SM-T225 and used it with T Mobile in the US, but the data stops working a lot. some times it shows 4G on the notification but no internet, other times it shows "E" in place of "4G" and very very slow internet or no internet. I tried moving to different location but the same problem, some times work and other times doesn't while the phone and my other tablets work normally. the WIFI works without a problem.
the tablet had CSC CHO and the service provider software version showing OWO CHO
the tablet is rooted and bootloader unlocked.
my questions
is it a tablet problem or this model doesn't work reliably in the us?
or it needs to be flashed with different firmware?
thanks
yousry2 said:
Hello
I got this tablet SM-T225 and used it with T Mobile in the US, but the data stops working a lot. some times it shows 4G on the notification but no internet, other times it shows "E" in place of "4G" and very very slow internet or no internet. I tried moving to different location but the same problem, some times work and other times doesn't while the phone and my other tablets work normally. the WIFI works without a problem.
the tablet had CSC CHO and the service provider software version showing OWO CHO
the tablet is rooted and bootloader unlocked.
my questions
is it a tablet problem or this model doesn't work reliably in the us?
or it needs to be flashed with different firmware?
thanks
Click to expand...
Click to collapse
Please show download modes screen.
thanks for taking the time to look at this
yousry2 said:
thanks for taking the time to look at this
Click to expand...
Click to collapse
Seem bootloader ok , firmware ok, try to clean flash with stock.
But now where are you? Chile or US. If live in us why not installed US firmware Region.?
I am in the US and this model is not used in the states by any provider, no firmware for it in US as far as I know https://samfw.com/firmware/SM-T225
I flashed it before with stock firmware (CHO) after I flashed it with magisk patched boot loader but same problem, I will give it another try now. at first when I flashed it with magisk I used in the in the CSC slot HOME_CSC_OWO_ but later I used CSC_OWO_ if that matters.
unfortunately after flashing stock firmware https://samfw.com/firmware/SM-T225/CHO/T225XXU1BVGB same problem.
I have this tablet in the USA on att post paid with a "phone" based sim. It can txt via the native mssgs app or Google messages. It won't make phone calls via the native app. Voip calls over Google voice will work.
Also tmobile sells this tablet as a the sm-t227 and it works fully ont their network
yousry2 said:
unfortunately after flashing stock firmware https://samfw.com/firmware/SM-T225/CHO/T225XXU1BVGB same problem.
Click to expand...
Click to collapse
Can't used sm-t225 with your provider. Sorry
I am aware that the 227 is used by T Mobile, but I read a comment on XDA that the Bootloader of 227 used in the US is not unlockable and I went with the 225 to be able to unlock the bootloader
I am returning.
I appear to have basically the same issue. I cqn send texts but mobile data just does not register. I have model T227u that was sold through Fido in canada. I hqve a 12 gb data plan and everything works fine on a phone. (I also have a note 9 that is starting to crap out.)
It is running android 13 and is rooted with magisk 26.1 patched boot img
solution for this issue is to just Flash one of the SM-T225 official firmwares for T-Mobile Europe. (I switched it to using the Poland (T-Mobile) - TPL version. T225XXS2CWA6
tom.android said:
Can't used sm-t225 with your provider. Sorry
Click to expand...
Click to collapse
Now, that IS interesting, particularly if that conclusion applies to every "unlocked" version of T225 sold in the Western Hemisphere. Mine was sold by Amazon's on line from store, specifically advertised to work as phone etc. Been trying to solve by GSI, twrp root for a while. Getting an "involuntary" refund from Amazon so it's worth trying.