I was wondering. I have the T-Mobile S7 Edge and when I get it unlocked could I flash almost any stock firmware that is based on the Qualcomm varent?
Like go from T-Mobile's Stock to AT&T's stock rom?
Correct.
After you flash your desired USA Qualcomm variant stock rom, be sure to flash your desired carrier's modem over the freshly flashed rom. This would ensure that all your LTE bands are not only firing correctly, but optimally because the incorrect modem parameters will cause battery drain.
ant0nius said:
Correct.
After you flash your desired USA Qualcomm variant stock rom, be sure to flash your desired carrier's modem over the freshly flashed rom. This would ensure that all your LTE bands are not only firing correctly, but optimally because the incorrect modem parameters will cause battery drain.
Click to expand...
Click to collapse
Now I did update to T-Mobile's Android 7 update, would that make it so I cant do this anymore?
Vicpdx18 said:
Now I did update to T-Mobile's Android 7 update, would that make it so I cant do this anymore?
Click to expand...
Click to collapse
You may flash unlimited more times as you please. So long as only Official Samsung firmwares are used, KNOX will never be triggered.
I have flashed countless times on my S7E and it hasn't broke yet lol. I am running TMO 7.0 Nougat firmware on my Verizon branded S7E (SM-G935V) right now.
In a few weeks, I'm planning to gift it to my friend for her birthday. Since she has AT&T, I will simply download and flash the latest AT&T 7.0 Nougat firmware via Odin. If she decides to change carrier to Verizon or TMobile later on, I would just have to help her reflash the corresponding firmware via Odin. No biggy whatsoever. :cyclops:
So I've spent a few hours searching XDA to find the right resources on how to flash a different U.S. carrier's GS7 Edge firmware on the T-Mobile branded device. I found out that since all the internal hardware for all U.S. devices are identical, I'd be able to flash any one carrier's firmware on to any carrier's device, provided there are no inconsistencies with the bootloader versions of the firmwares.
The phone is intended for an extended family member and I am able to purchase a T-Mobile GS7 Edge for significantly cheaper than from any other carrier. Because it will be used on AT&T's network, I wanted to make sure I got everything right before I get started. I either want to flash the AT&T version which will allow it to be fully compatible on the network, or the Unlocked version. Apparently, the unlocked version is completely debloated since it's not associated with any carrier and provides better benchmarks, especially battery life, so I'm interested in that.
I've compiled the resources I need in the following:
https://forum.xda-developers.com/att-s7-edge/how-to/firmware-att-s7-edge-g935a-official-t3412312
https://forum.xda-developers.com/att-s7-edge/help/att-t-mobile-bootloader-version-t3473281
https://forum.xda-developers.com/tmobile-s7-edge/help/installed-sm-g935u-sm-g935t-firmware-t3482945
https://forum.xda-developers.com/att-s7-edge/how-to/samsung-sm-935u-firmware-install-guide-t3411451
https://forum.xda-developers.com/att-s7-edge/how-to/firmware-pi2-s7-edge-sm-g935a-10-03-16-t3477246
https://forum.xda-developers.com/verizon-s7-edge/how-to/odin-stock-nougat-firmware-t3570156
https://forum.xda-developers.com/att-s7-edge/how-to/updated-935u-935a-live-links-pi3-t3501686
http://updato.com/firmware-archive-select-model?q=SM-G935U&order=date&dir=desc&exact=1
etc.
One question I have is whether I am able to flash the Unlocked firmware at all. I don't currently have the device in hand so I can't check the baseband version, but my understanding is that the Unlocked version is currently on a lower bootloader version whereas it is v4 for AT&T or T.Mobile. This would mean I would be able unable to flash the Unlocked firmware if the device already has a higher version of the bootloader, right? Conversely, I would be able to do so if the T-Mobile bootloader was on the same version as the Unlocked version (e.g., if the device hasn't had an update to its bootloader).. The same issue would arise if I wanted to go back to a carrier firmware. Where can I find a list of T-Mobile firmwares and their bootloader versions so that I can check? Threads I've searched are saying I can't go to 935U from 935A/T because of mismatching bootloaders but others are saying I can go back to 935A/T on Nougat (same bootloader versions?) so clarification would be greatly appreciated.
Edit: Just discovered the bootloader version can be determined by looking at the 9th character in the baseband version. Pretty simple!
Another question I have is whether flashing the AT&T firmware will give me VoLTE, Wifi Calling, tethering, etc. on AT&T's network. I've established that if I flashed the Unlocked firmware, I'll lose these functions (unless I root the phone, but that's a no-go since I need Samsung Pay intact). Just wanted to make sure that I would retain these features if I flashed the AT&T firmware on the T-Mobile device. Also, would I receive all OTAs pushed from AT&T while I'm on their firmware, even though it was a T-Mobile device? Or would I have to manually update it somehow?
Many thanks in advance.
Yes you can flash the unlocked firmware, I do recommend flashing the at&t CP (radio) though for better signal.
For tmobile all we lose is video calling, we retain everything else. I can't answer your other questions since I have not used this phone from tmobile on at&t. I have used the at&t model on tmobile with U and had no issues.
Sent from my SM-G935U using XDA Premium HD app
justda said:
Yes you can flash the unlocked firmware, I do recommend flashing the at&t CP (radio) though for better signal.
For tmobile all we lose is video calling, we retain everything else. I can't answer your other questions since I have not used this phone from tmobile on at&t. I have used the at&t model on tmobile with U and had no issues.
Sent from my SM-G935U using XDA Premium HD app
Click to expand...
Click to collapse
^^^^^this man is correct. Also, is the device you want to flash Carrier unlocked? Even though youre flashing a different carriers firmware or even the U firmware I believe the IMEI still needs to be unlocked from the original carrier. Obviously just pop the at&t sim card in the t mobile phone to see if its unlocked. hope this helps.
black96ss said:
^^^^^this man is correct. Also, is the device you want to flash Carrier unlocked? Even though youre flashing a different carriers firmware or even the U firmware I believe the IMEI still needs to be unlocked from the original carrier. Obviously just pop the at&t sim card in the t mobile phone to see if its unlocked. hope this helps.
Click to expand...
Click to collapse
Yes, it'll be unlocked, so there won't be problems there. If I flash the AT&T firmware and not the Unlocked firmware, I will retain video calling, yes?
justda said:
Yes you can flash the unlocked firmware, I do recommend flashing the at&t CP (radio) though for better signal.
For tmobile all we lose is video calling, we retain everything else. I can't answer your other questions since I have not used this phone from tmobile on at&t. I have used the at&t model on tmobile with U and had no issues.
Sent from my SM-G935U using XDA Premium HD app
Click to expand...
Click to collapse
If I flash the current version of the Unlocked firmware, can I go back to AT&T's or T-Mobile's firmware?
Synchronicities said:
Yes, it'll be unlocked, so there won't be problems there. If I flash the AT&T firmware and not the Unlocked firmware, I will retain video calling, yes?
Click to expand...
Click to collapse
flashing the at&t firmware will just be like having an original at&t s7 edge so yes. The Unlocked firmware will be lighter with no video calling(no carrier apps, no carrier boot animation, some of the quick toggles will be different) you will retain VOLTE HD calling, wifi calling(if at&t has that) and with the at&t you will have all the bloat (about 2-3 GB of used storage plus more a tad bit more use on ram usage) which will use more battery. remember like stated above, if you do decide to flash the U firmware, make sure you flash the latest At&t CP being you will have better coverage since youll be on the at&t network.
Synchronicities said:
If I flash the current version of the Unlocked firmware, can I go back to AT&T's or T-Mobile's firmware?
Click to expand...
Click to collapse
I was able to flash back to T mobile from the U, I never tried anything with a At&t variant or the at&t firmware
I am also interested. If I flash
1) Will the device status remain "Unmodified" - I use Good for Enterprise for work email and it won't function on rooted or modified devices
2) Will Android Pay Work?
3) Will I get Software updates directly?
cnewsgrp said:
I am also interested. If I flash
1) Will the device status remain "Unmodified" - I use Good for Enterprise for work email and it won't function on rooted or modified devices
2) Will Android Pay Work?
3) Will I get Software updates directly?
Click to expand...
Click to collapse
Can someone review and comment?
---------- Post added at 12:24 PM ---------- Previous post was at 12:19 PM ----------
black96ss said:
flashing the at&t firmware will just be like having an original at&t s7 edge so yes. The Unlocked firmware will be lighter with no video calling(no carrier apps, no carrier boot animation, some of the quick toggles will be different) you will retain VOLTE HD calling, wifi calling(if at&t has that) and with the at&t you will have all the bloat (about 2-3 GB of used storage plus more a tad bit more use on ram usage) which will use more battery. remember like stated above, if you do decide to flash the U firmware, make sure you flash the latest At&t CP being you will have better coverage since youll be on the at&t network.
I was able to flash back to T mobile from the U, I never tried anything with a At&t variant or the at&t firmware
Click to expand...
Click to collapse
Does Android Pay work on "U" firmware?
Should I get CP from here => https://forum.xda-developers.com/att-s7-edge/how-to/firmware-att-s7-edge-g935a-official-t3412312
I this a good thread for instructions to install U firmware on T => https://forum.xda-developers.com/att-s7-edge/how-to/samsung-sm-935u-firmware-install-guide-t3411451
cnewsgrp said:
Can someone review and comment?
---------- Post added at 12:24 PM ---------- Previous post was at 12:19 PM ----------
Does Android Pay work on "U" firmware?
Should I get CP from here => https://forum.xda-developers.com/att-s7-edge/how-to/firmware-att-s7-edge-g935a-official-t3412312
I this a good thread for instructions to install U firmware on T => https://forum.xda-developers.com/att-s7-edge/how-to/samsung-sm-935u-firmware-install-guide-t3411451
Click to expand...
Click to collapse
Yes and yes
Sent from my SM-G955U1 using XDA-Developers Legacy app
cnewsgrp said:
I am also interested. If I flash
1) Will the device status remain "Unmodified" - I use Good for Enterprise for work email and it won't function on rooted or modified devices
2) Will Android Pay Work?
3) Will I get Software updates directly?
Click to expand...
Click to collapse
I Flashed an AT&T S7 Edge with T-Mobile firmware and:
1) Status remains unmodified
2) Android pay works (as well as Samsung pay)
3) I've already got 2 T-Mobile pushed firmware updates that installed without any issues.
Don't know if this helps, but I'd think it would be the same going from T-Mobile to AT&T.
I did also have to use a modified version of "ODIN" and flash a "PIT" file because T-Mobile has a different partition than AT&T.
pierre3408 said:
I Flashed an AT&T S7 Edge with T-Mobile firmware and:
1) Status remains unmodified
2) Android pay works (as well as Samsung pay)
3) I've already got 2 T-Mobile pushed firmware updates that installed without any issues.
Don't know if this helps, but I'd think it would be the same going from T-Mobile to AT&T.
I did also have to use a modified version of "ODIN" and flash a "PIT" file because T-Mobile has a different partition than AT&T.
Click to expand...
Click to collapse
Thanks! I am almost ready. Final checks
- I downloaded 935U firmware from here https://forum.xda-developers.com/tmobile-s7-edge/how-to/4-28-t-mobile-935-firmware-t3597866 (File is G935UUEU4BQD2_G935UOYM4BQD2_TMB.zip)
- I am planning to use ODIN 3.12.7
- Since I am on ATT Network I will use ATT Radio (CP File). I downloaded ATT firmware from here => https://forum.xda-developers.com/att-s7-edge/how-to/odin-files-to-s4bqc2-g935a-t3582874
I will use this CP => CP_G935AUCS4BQC2_CL10280464_QB12904088_REV02_user_low_ship_MULTI_CERT.tar
Am I doing everything right?
Should I just flash all U files (including Radio) and flash ATT Radio later?
Please advise
Hi team
I have the tmo ime version of the s7 edge, but flash the ATT firmware BQC2 and now I can not go back to tmobile firmware or the U firmware I got the following error in Odin:
Error device info
Who can help me,?I going to gift my s7 edge to my brother and he is on Tmobile network
Galaxy S7 active
I have a at&t Galaxy S7 active unlocked and i transfer my service to T-Mobile but I am not able to get updates can I flash T-Mobile firmware so I can have the T-Mobile interface and updates. What do I need to do to get the updates.
All US variants can flash the firmware interchangeably. Just download the corresponding firmware and flash everything(Except for the modem if you'd want to keep the original modem). You dont need anything special. If the default odin dont work, then try the comey "cracked" version.
Eric1084 said:
All US variants can flash the firmware interchangeably. Just download the corresponding firmware and flash everything(Except for the modem if you'd want to keep the original modem). You dont need anything special. If the default odin dont work, then try the comey "cracked" version.
Click to expand...
Click to collapse
Why is it that we use the CP for AT&T; however, use the Unlocked CP for TMobile? Are the radios the same for the unlocked and T-Mobile variants? Where would I get this information if I needed it in the future?
I have a GS7 edge locked to T-Mobile with the Device Unlock app. Will flashing G9350U firmware unlock my device and bypass the Device Unlock app or will I still need to use this app to unlock?
Radios are different. I flashed ATT Radio after I flashed U firmware. Though honestly I cannot tell the difference
cnewsgrp said:
Radios are different. I flashed ATT Radio after I flashed U firmware. Though honestly I cannot tell the difference
Click to expand...
Click to collapse
you did the sae thing that I am currently doing. going from tmobile (I believe) to AT&T firmware. I am going from verison (which shouldn't matter) but when I did it the first time odin 3.12.7 gave me a message of success after only one "sector" of the whole thing went green. but the phone rebooted to an error message. did I do something wrong? help??
Shadow_Sheik said:
you did the sae thing that I am currently doing. going from tmobile (I believe) to AT&T firmware. I am going from verison (which shouldn't matter) but when I did it the first time odin 3.12.7 gave me a message of success after only one "sector" of the whole thing went green. but the phone rebooted to an error message. did I do something wrong? help??
Click to expand...
Click to collapse
Sorry not an expert, but I read several times here to use Price COmsy ODIN and I use that one. Please try
OTA Update is not working after changing to U firmware.
I had stock T Mobile last firwmare installed, but I was sick of poor battery and lag
so installed this firmware https://forum.xda-developers.com/tmobile-s7-edge/how-to/6-8-t-mobile-935u-firmware-qe2-t3619151, full wipe.
Now I have worst battery performance. 12% draining overnight (6 hours) without touching the phone at all. It shows a new update but it fails when I OTA update. looks like the update it's being installed but fails at the end. Don't know what's wrong but totally hate battery.
Edit: Android pay is also not working..
pierre3408 said:
I Flashed an AT&T S7 Edge with T-Mobile firmware and:
1) Status remains unmodified
2) Android pay works (as well as Samsung pay)
3) I've already got 2 T-Mobile pushed firmware updates that installed without any issues.
Don't know if this helps, but I'd think it would be the same going from T-Mobile to AT&T.
I did also have to use a modified version of "ODIN" and flash a "PIT" file because T-Mobile has a different partition than AT&T.
Click to expand...
Click to collapse
What pit file did you flash? Did you flash the the pit file Odin pulls from your phone? Did you flash an att specific pit file?
Im trying to carrier switch my U1 to ATT, but my U1 is already on BL5. A quick search of ATT tells me that the latest FW is currently G950USQU5CRG3 as cited here https://www.att.com/devicehowto/tut...3?make=Samsung&model=SamsungG950U&gsi=iqel_vM
Does anyone know if this FW is leaked for download? Or if I flash the sprint fw with this build without userdate if the att bloat will install based off my sim? (i need carrier features)
You can flash CRF5 still and be fine. The bootloader didn't change and that's what matters.
If you download it from updato.com and download say, the VZW labeled firmware it will essentially be the same as all carriers are included. When you flash it, sensing your sim card's carrier it will install the proper files.
I purchased a US Cellular branded Tab S3 to use on AT&T when I found out they sell them unlocked. I also recently wanted Oreo on it and after some digging found US Cellular still hasn't released an update but there was one from Turkey and one from VzW. I tried to find a concrete yes/no if I can flash other variants of the T827 models firmware without luck so figured I'd roll the dice on it myself. This weekend I tracked down the VzW Oreo firmware and used Odin to install it on my US Cell Tab. The first round I had a couple of errors and for a second thought I had a new paper weight, but kept calm and ran through the process again and it worked!
Just a note:
At first boot it will say the SIM is invalid and to put in a VzW SIM, but you can click ok and keep going. Once done setting up on wifi you can then go into settings and add the AT&T APN and connect over cell.
Could you post where you got the VZW image? I'd like to try this. I can't believe USC hasn't updated their tabs yet. I'm tired of asking when the update will arrive!
alfredtv said:
I purchased a US Cellular branded Tab S3 to use on AT&T when I found out they sell them unlocked. I also recently wanted Oreo on it and after some digging found US Cellular still hasn't released an update but there was one from Turkey and one from VzW. I tried to find a concrete yes/no if I can flash other variants of the T827 models firmware without luck so figured I'd roll the dice on it myself. This weekend I tracked down the VzW Oreo firmware and used Odin to install it on my US Cell Tab. The first round I had a couple of errors and for a second thought I had a new paper weight, but kept calm and ran through the process again and it worked!
Just a note:
At first boot it will say the SIM is invalid and to put in a VzW SIM, but you can click ok and keep going. Once done setting up on wifi you can then go into settings and add the AT&T APN and connect over cell.
Click to expand...
Click to collapse
Not sure that was a good idea. If indeed you did manage to flash the VZW bootloader then the tablet is now likely bootloader locked with no way of returning to its original state.
ashyx said:
Not sure that was a good idea. If indeed you did manage to flash the VZW bootloader then the tablet is now likely bootloader locked with no way of returning to its original state.
Click to expand...
Click to collapse
Was this verified to be the case? Also would the verizon combination file work on the uscelluar tablet? I picked up a cheap SM-T827R4 that is FRP locked. I am waiting to hear back from the original owner if they would be willing to bypass the verification for me.
Writermike said:
Was this verified to be the case? Also would the verizon combination file work on the uscelluar tablet? I picked up a cheap SM-T827R4 that is FRP locked. I am waiting to hear back from the original owner if they would be willing to bypass the verification for me.
Click to expand...
Click to collapse
I was able to flash the combo file for the SM-T827V (Verizon version of the Tab S3) to bypass the FRP lock. I used the one on gsm-firmware.com After which I was able to reflash the uscelluar firmware from sammobile. I don't know if this is exactly the same as the OP's method, but hope it helps someone else out in the future.
Writermike said:
I was able to flash the combo file for the SM-T827V (Verizon version of the Tab S3) to bypass the FRP lock. I used the one on gsm-firmware.com After which I was able to reflash the uscelluar firmware from sammobile. I don't know if this is exactly the same as the OP's method, but hope it helps someone else out in the future.
Click to expand...
Click to collapse
Sorry for the late reply on this. I downloaded the image files from sammobile and installed them with odin. I've been up and running on Oreo (VzW branded) since my post and have had no issues or reasons to flash to anything else. I have tried to run an update but it says it can't register, which i assume is because it's hitting the VzW servers w an ATT SIM from a USC device!
Sent from my SM-G955U using Tapatalk
alfredtv said:
I have tried to run an update but it says it can't register, which i assume is because it's hitting the VzW servers w an ATT SIM from a USC device!
Sent from my SM-G955U using Tapatalk
Click to expand...
Click to collapse
You just need to put a Verizon SIM in it once (and so far only once) to check for updates. The SIM doesn’t even need to be provisioned. Then you can check for updates with your normal SIM.
I’ve had a VZW Tab S3 for over a year that I have been using with AT&T. I updated to Oreo without any issues with my AT&T SIM installed.
Wanted to first say thanks for the tip -- and echo that The T827R4 does in accept the Verizon Oreo firmware via the latest version of Odin, though with a build just a few releases behind it threw an error and would not flash.
I guess if we can't have root we may as well have Oreo.
Samemobile has the January security update Oreo
alfredtv said:
I purchased a US Cellular branded Tab S3 to use on AT&T when I found out they sell them unlocked. I also recently wanted Oreo on it and after some digging found US Cellular still hasn't released an update but there was one from Turkey and one from VzW. I tried to find a concrete yes/no if I can flash other variants of the T827 models firmware without luck so figured I'd roll the dice on it myself. This weekend I tracked down the VzW Oreo firmware and used Odin to install it on my US Cell Tab. The first round I had a couple of errors and for a second thought I had a new paper weight, but kept calm and ran through the process again and it worked!
Just a note:
At first boot it will say the SIM is invalid and to put in a VzW SIM, but you can click ok and keep going. Once done setting up on wifi you can then go into settings and add the AT&T APN and connect over cell.
Click to expand...
Click to collapse
I just updated to Oreo for SM-T827R4 to January security patch 8.0.0 firmware from Sammobile and it working great.
my370z said:
I just updated to Oreo for SM-T827R4 to January security patch 8.0.0 firmware from Sammobile and it working great.
Click to expand...
Click to collapse
You're right about Verizon firmware running really smooth. Much better than the US Cellular firmware. After flashed VZ firmware, the model changed to SM-T827V.
in case anyone has the us cellular model, you really don't need to flash the verizon firmware because the us cellular model has a more updated firmware than the verizon model.
the model is actually SM-T827R4, oreo with apr 2019 security and OTA update works too.
though no pie update yet (same as verizon)
So these can't be flashed to the stock 820 pie rom?
picachux said:
So these can't be flashed to the stock 820 pie rom?
Click to expand...
Click to collapse
good news, the official pie is available now, OTA downloading now
Verizon model still stuck at oreo
supaet said:
good news, the official pie is available now, OTA downloading now
Verizon model still stuck at oreo
Click to expand...
Click to collapse
Thanks for the heads up will check when I get home.
Sent from my SM-T827R4 using Tapatalk