[GUIDE][WIP]T-Mobile Brand Conversion to Rooted Global Firmware

[Msfdfsx]

Reserved for old instructions. Going from 10.0.7 and up the instructions were changed and certain steps weren't needed, like flashing Indian before Global.

Keeping these here just in case someone purchases a phone with older firmware and doesn't want to wait updating to the latest version.


Requirements:
ADB setup and working
Global OTA ZIP (grab the 10.0.6 from here)
Updated 10.0.7 OTA Build from hereas well
Indian Fastboot ROM(grab the latest from here)
Pre-Rooted 10.0.6 boot.img file here
Magisk Canery apk

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This group of instructions are going to walk you through on how to unlock your bootloader. This is the first general step in converting your device into a global device.

1. Either follow the rules via T-Mobile (paid off and 40 days on the network) or visit this thread and get the hook up from our friend (send him some cash, for real I did this and it worked hopefully he keeps up with this for a while!). This will allow you to use the Unlock App to permanently unlock your phone.
2. Open the "Unlock" app that's preinstalled on your phone and click on Permanent Unlock. If you have completed Step One correctly, it'll congratulate you and ask you to reboot your phone.
3. Reboot your phone and Enable Developer Settings. Check out the OEM Unlock button is now able to be switched off. Switch it off.
4. Be sure to also tick USB Debugging.
5. You'll now need to submit a request for an unlock_code.bin file from OnePlus via this link. It takes a week. Seriously almost down to the second. There's no avoiding this. I've read several people try (myself included) all met with the same fate. Wait. 7 whole days. You'll get an email from OnePlus containing the unlock_code.bin file. Download this file and save it to your ADB folder.
6. Reboot your phone into fastboot--

adb reboot bootloader

fastboot oem unlock

This will unlock your bootloader and wipe your device
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Now that you've unlocked your bootloader, lets get to flashing the Global Rom--

7. Extract the contents of the Indian Fastboot Rom zip folder directly into your ADB folder.

a. If you did this correctly your ADB folder will be filled with a bunch of new .img files. Like boot.img​

8. Open CMD (with admin rights) and navigate to your ADB folder. I've heard users try to use Powershell and while it works mostly, ymmv. I stick with CMD and haven't had any issues.
Mine would be--

cd c:\adb\

This will also wipe your data, be sure to save anything that you need prior to running the following command.​

flash-all.bat

10. If you've never flashed via fastboot before, this is going to spit a bunch of information to you that might look like garbage. Your phone will boot a few different times including into FastbootD (link for explanation) But it's telling you what it's flashing and how fast it's doing it. There's a common looking error that happens every time you do this. It says "Invalid sparce file format at header magic". This is normal, just ignore it and keep waiting. Once everything settles, the device will reboot by itself. If it doesn't, like bootloops to the bootloader, start over and go back to Step 5 and try again.
11. Once the device boots up, you should now be on the Indian build for the OnePlus 7T.
12. Be sure to copy the Global OTA to the root storage of your OnePlus 7T. If you haven't, do so now.
13. Reboot the phone and boot the Modded-boot.img file from the bootloader

adb reboot bootloader
fastboot boot modded-boot.img

14. Once the phone boots up, you should now have temp root. Go to settings > system updates and look for the gear on the top right-hand corner. If it's not there, something didn't flash right. Go Back to Step 2 and try again. Click on it and select Local Upgrade
15. Select the Global OTA file and it'll start to flash from within the update app. Let this finish before proceeding.
16. Install Magisk Manager Canary from here
17. Check in the middle of the screen for "advanced options" and make sure Preserve force encryption and preserve avb 2.0/dm-verify are checked.
18. Now look under the first Magisk check and make sure that it's telling you there's an update to "Magisk" and run through that update via direct install.
19. Once that finishes it'll have you reboot the phone.
20. You've now fully converted to the Global Firmware and Rooted. Confirm this by going to settings > about phone and look at Build Number. Should say 10.0.6(as of the time of this post, I'll try to update this as I can)

If you'd like to update to 10.0.7:
1. Download and move the OTA file for 10.0.7 to the root of your OP7T
2. Go to Settings > System > System Updates and look for the gear in the top right.
3. Select Local upgrade and select the update file for 10.0.7.
4. Let it run through and finish, don't reboot.
5. Open Magisk Manager
6. Update and select direct install to inactive boot partition to update.
7. Once this finishes, reboot and you're now on 10.0.7 rooted.

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This message appears *the bootloader is already unlocked* but it's locked

 

[orangepowerpokes]

This message appears *the bootloader is already unlocked* but it's locked

If thats the case and phone is payed off and has had tmo sim for something like 45 days, then part 1/2 call tmo and request phone be unlocked. Then part 2/2, send a bootloader unlock request to oneplus via their website form, and then wait the 7 days for the fastboot file.

 

[w1ne]

1. Either follow the rules via T-Mobile (paid off and 40 days on the network) or visit this [URL='https://forum.xda-developers.com/oneplus-7t/how-to/t-mobile-free-op7t-sim-unlocking-t4014053']thread[/URL] and get the hook up from our friend (send him some cash, for real I did this and it worked hopefully he keeps up with this for a while!). This will allow you to use the Unlock App to permanently unlock your phone.

The thread is no longer accepting any new inquiries, can someone please point me to a new thread? Person who is doing T-mobile unlock? The T-mobile support did not help. Thanks.

 

[eliaslear]

so i converted tmo to global when i got this phone. it's been great and all that. but i was tired of fighting unlocked bootlaoder and magisk when i wanted to use a secure app. times are getting strict with google. so, i decided i wanted to flash twrp and lineage. however, i previously upgraded to 12. i haven't done a ton of research, but from the little i gathered, you an no longer flash twrp to a and b since the jump to 12. you must be on 11. so i went through every msmtool version (EVERY!!!) until i landed on this one. hotdogt_11_O.01_210120.zip https://androidfilehost.com/?fid=17248734326145733789 . i will upload and post link if androidfilehost goes down again. people have had plenty of issues being unable to find mirrors on there lately. all that being said, i'm not sure why i flashed global in the first place. maybe it was cool. maybe i wanted the option of dual sim. maybe i wanted to be on the latest update as soon as possiible. i'm with metro so being locked to tmobile doesn't affect me at all. at any rate, i'm on lineage now and absolutely love it. so, to anyone else having these issues, or maybe even you just want to go back to stock from 12 and have a different issue, this particular package may help you. i'm posting to multiple applicable threads, but if mods don't agree with my decision i'm sorry and i'm sure you'll arrange accordingly.

 

[andr3w282]

Hi all,

In Canada - in 2020 purchased a "Factory unlocked" OnePlus 7T from a US retailer (BHPhotoVideo) but was known that it was the T-Mobile unlocked phone. Grabbed a dual sim card tray and it has happily been working with dual sim since.

The product item indicated: "This is the OnePlus 7T HD1907 Model. This model has been factory unlocked by OnePlus before shipping. There are no carrier locks or logos. All updates will be from OnePlus directly. The bootloader is ready to be unlocked. This version will not work on Verizon."

Partner upgraded to OS12 / HD1901_11_F.20 and it blocked/removed dual sim. In the about settings it also thinks the device is HD1901.

Planning to downgrade so doing some research...

Since this was "Factory unlocked" and dual sim was working, does that indicate it has the international firmware? Or since the dual sim is now broken, does that imply it's still the branded firmware? is there a way to inspect?

For rollback to 11, I'm assuming I'll need to follow the unbrick guide, but do I need to convert to global firmware first?

Thanks!

 

[Robinlong]

Hi all,

In Canada - in 2020 purchased a "Factory unlocked" OnePlus 7T from a US retailer (BHPhotoVideo) but was known that it was the T-Mobile unlocked phone. Grabbed a dual sim card tray and it has happily been working with dual sim since.

The product item indicated: "This is the OnePlus 7T HD1907 Model. This model has been factory unlocked by OnePlus before shipping. There are no carrier locks or logos. All updates will be from OnePlus directly. The bootloader is ready to be unlocked. This version will not work on Verizon."

Partner upgraded to OS12 / HD1901_11_F.20 and it blocked/removed dual sim. In the about settings it also thinks the device is HD1901.

Planning to downgrade so doing some research...

Since this was "Factory unlocked" and dual sim was working, does that indicate it has the international firmware? Or since the dual sim is now broken, does that imply it's still the branded firmware? is there a way to inspect?

For rollback to 11, I'm assuming I'll need to follow the unbrick guide, but do I need to convert to global firmware first?

Thanks!

Hi,

I was in the exact same position as you last week. When I upgraded my supposedly 'Factory Unlocked' HD1907 with no carrier branding to global F.20 ROM through OTA, it also then disabled the 2nd SIM slot and identified itself as HD1901. Looking into it, I realised that many other also had this issue as well.

After much reading conflicting information and debating with myself, I decided to downgrade using the Global MSM Tool for 10.0.16 and then upgraded to 11.0.9.1 following the 'North American' method in this post.

It all went smoothly, my 2nd Sim card slot works now and the device indentifies itself as HD1907 once again.

The only minor snag I faced, was getting the device into EDL mode, it would not enter EDL mode using the physical key combo, neither through 'Reboot to EDL' in Magisk. I had to use the ADB command: 'adb reboot edl' for it to work.

 

[andr3w282]

Hi,

I was in the exact same position as you last week. When I upgraded my supposedly 'Factory Unlocked' HD1907 with no carrier branding to global F.20 ROM through OTA, it also then disabled the 2nd SIM slot and identified itself as HD1901. Looking into it, I realised that many other also had this issue as well.

After much reading conflicting information and debating with myself, I decided to downgrade using the Global MSM Tool for 10.0.16 and then upgraded to 11.0.9.1 following the 'North American' method in this post.

It all went smoothly, my 2nd Sim card slot works now and the device indentifies itself as HD1907 once again.

The only minor snag I faced, was getting the device into EDL mode, it would not enter EDL mode using the physical key combo, neither through 'Reboot to EDL' in Magisk. I had to use the ADB command: 'adb reboot edl' for it to work.

Thanks for the reply and sharing info for everyone. Glad what you did worked! What you describe(Global MSM Tool via North America version) is what I was going to attempt, but ended up trying something else first. Sharing below in case it helps anyone else:

While still digging last night and debating what to do I stumbled into the 'official' rollback files when they introduced OS 12 (before this latest patch). Those files and instructions are here: https://community.oneplus.com/thread/1181167844348919809

However something important to know is that the OS 12 latest update removed the local upgrade option via the gear under update stats (what the hell). More info on that here https://forum.xda-developers.com/t/how-to-local-upgrade-since-android-12.4431607/. To work around that, there's an APK they provided here: https://community.oneplus.com/thread/1555060


Something else worth noting for any readers, is 7t is now EOL. It went EOL before this latest update. It seems unclear whether HD1901_11_F.20 is going to the last update or not, so it may be possible the bugs in OS12 on 7T will not be addressed (couldn't find anything saying it will be). https://www.xda-developers.com/oneplus-7-7t-end-of-life-final-update/


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To rollback Unlocked, Unbranded 7T HD1907 (T-Mobile "factory unlocked") which was running HD1901_11_F.20 (and now displaying HD1901) back to OS 11, to fix the dual sim broken problem, did the following:

** The following will wipe your device **

1. Copy the rollback file from https://community.oneplus.com/thread/1181167844348919809 to phone root directory. Used the Global file (GM1903_11.H.31). You'll notice URLs for "IN"dia and "GLO"bal are the same URLs.

2. Copied and installed local upgrade APK file found here (Step 3 under rollback guide): https://community.oneplus.com/thread/1555060

3. Ran the Local File Upgrade APK file and pointed the application to the local file in step (1)

4. Waited approximately 5-10 mins for it to finish. Rebooted the phone.

5. Phone booted into clean reset OS 11. I triggered an OTA update to grab the latest OS 11 security patch. Triggering another OTA update, it attempted to grab HD1901_11_F.20. Cancelled and will be ignoring the upgrade notification moving forward.

6. Dual sim is now working again.

 

[Robinlong]

Cancelled and will be ignoring the upgrade notification moving forward.

You can disable the package called com.oneplus.opbackup with your favorite method to disable the updater, it becomes completely greyed out in settings. It worked for me on OOS 11.

 

[andr3w282]

You can disable the package called com.oneplus.opbackup with your favorite method to disable the updater, it becomes completely greyed out in settings. It worked for me on OOS 11.

amazing, thanks for that tip!

 

[cher81]

Anyone knows if I can flush global version over T-Mobile without unlocking it with T-Mobile? Can I unlock bootloader after that and flush LineageOS?