Convert T-Mobile to International (with Bootloader Re-LOCK)

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The required files will be attached in the end of this guide.
OnePlus 8 TMobile to Global Fastboot ROM
MSM TOOL for IN2017

Alternatives from the files above, if you get errors every time you are trying to flash like "NO SIM INSTALLED"
(THIS IS WHAT I PERSONALLY USE):
MSM TOOL for IN2017 Alternative
OnePlus 8 Fastboot ROM Alternative

1st Step: (Make sure Test Mode is ON and Driver Signature is OFF)
First install the Drivers of the phone and the Qualcomm Drivers inside the DRIVERS.zip attached to this thread.

2nd Step: Make sure your OnePlus 8 IN2017's bootloader is unlocked- unlocking bootloader will result to factory resetting your phone. Please backup your phone before doing this process. Instructions on how to unlock

3rd Step: After the bootloader is unlocked, you have to enable "USB Debugging" and reboot your device to Fastboot Mode.

4th and Last Step: Unzip the ZIP file and Open the Global Rom (10.5.12 OnePlus 8 Global Rom). Find flash-all.bat and double click on it. Type and enter Y when it asks to and just let it do its Terminal Process.

**After the batch file is done, your phone should automatically boot to Global Rom Oxygen OS and no more of that T-Mobile
splash screen.

This is a YouTube walkthrough video on how to do it: Credits to Fizzy Apps on YouTube


DO NOT LOCK YOUR BOOTLOADER YET, TO LOCK BOOTLOADER (THIS WILL WIPE EVERYTHING):
-Download the latest OxygenOS 11 ROM
-Move the downloaded ROM from "Downloads" folder to "Internal Storage"
-Go to settings and find System Update, then press Local Update and choose the downloaded ROM
-After its done installing, click REBOOT/Restart the device
-After rebooting, go into FASTBOOT MODE and when you are in FASTBOOT MODE, type "fastboot oem lock"
-Press the volume buttons to select LOCK BOOTLOADER and there you go, LOCKED Bootloader!

IF SOMEHOW YOU GOT "QUALCOMM CrashDump Mode" during the 4th step or you locked Bootloader right after flashing ROM and it got corrupted.

1) Enable Test Mode and Disable Driver Signature Verification on Windows PC.

2) On your phone, simultaneously press and hold Volume Up (+) and Power Button and when the screen shuts down, IMMEDIATELY release both buttons. This means you forced shutdown the device.

3) Set year date on your PC to 2017 and Turn off WIFI for MSM Tool to work and after doing this, open MSM TOOL folder you downloaded at the top of this guide and click MsmDownloadTool V4.0.exe

4) On Login, set user type to "OTHER" and click next. at the top left side find "TARGET" and set it to O2/TMO

5) While simultaneously holding both the volume buttons, connect the phone to the PC. As soon as the phone is connected, a COM# like COM3, etc. will appear on the MSM Tool and immediately click ENUM, then click COM#, then Start. (If COM# doesn't show up just continue to click the ENUM button during process and it should show up)

<A YouTube Video walkthrough of this process> Credits to Shahin Shaan for this.

**This should start the process of restoring your phone back to OxygenOS 10 and you have to start back to square 1 in order to flash Global ROM again. So, USB Debugging>Fastboot Mode>Unlock Bootloader>Enable USB Debugging Again>Boot again to Fastboot>Double Click on flash-all.bat on Global ROM folder. Also, I added TOOL ALL IN ONE which should make unlocking bootloader, booting to Fastboot faster.



Credits to these amazing people for making this possible:

@matteosaeed and his Guide.
•Ms. user_ajusee's Guide
•Mr. gregoryaul (@Aulgreg38) from HighOnAndroid Forums
•THE MAN HIMSELF: Mr. Max Lee himself of HighOnAndroid Forums; link to his YouTube channel.
 

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Last edited:
UPDATE: 04/10/2022
IF THE MSM TOOL THAT I PROVIDED DOESN'T WORK TRY THIS VERSION OF MSM TOOL AND EURO FASTBOOT ROM. THEN JUST FOLLOW THE GUIDE ON THE END OF THIS THREAD TO GO TO GLOBAL
MSMTool
OnePlus 8 Euro ROM
(In my status of converting using 10.5.7, I cannot get a working SIM Signal and It keeps rebooting the phone. So if you have problems similar to this, just use these versions because these have worked for me so far.)

UPDATE 11-21-2021:
LOCKED BOOTLOADER SCREENSHOTS*

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Adriancris7

Senior Member
Aug 22, 2013
106
9
Hi man i do everthing like the post say and i got it. But i notices that when you convert t-mobile oneplus 8 to global you lose safetynet. so i was wondering 2 things. How can i get safetynet working again, and if i relock the bootloader with the global firmware will it boot or it will break? Thanks mate.
 
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Hi man i do everthing like the post say and i got it. But i notices that when you convert t-mobile oneplus 8 to global you lose safetynet. so i was wondering 2 things. How can i get safetynet working again, and if i relock the bootloader with the global firmware will it boot or it will break? Thanks mate.
If you lock bootloader the system will say your phone has been corrupted and if you did happened to lock your bootloader. You are gonna have to use MSM tool to restore OS and your are gonna have to start again to step 1.

For the other issue which is safetynet, did you root your phone? From what I know you would only lose your safety net when you root your phone. I did root my phone 2 weeks ago and from what I remember my safetynet was fine. You are gonna have to ask someone about safety net man since I am no expert at that region.

Anyways, thank you for using this guide. Really appreciate it man 😁👍
 
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Adriancris7

Senior Member
Aug 22, 2013
106
9
If you lock bootloader the system will say your phone has been corrupted and if you did happened to lock your bootloader. You are gonna have to use MSM tool to restore OS and your are gonna have to start again to step 1.

For the other issue which is safetynet, did you root your phone? From what I know you would only lose your safety net when you root your phone. I did root my phone 2 weeks ago and from what I remember my safetynet was fine. You are gonna have to ask someone about safety net man since I am no expert at that region.

Anyways, thank you for using this guide. Really appreciate it man 😁👍
Ok, I see.. I didn't root the phone. I just want to know. It's just I try to install Netflix in play store and the app didn't show.... So I install safetynet test and shows that it's not working... I don't have plane to root the phone. I only want to convert the phone to global... I don't know how to solve the issue of safetynet.. that why I ask you. Anyway the phone is working flawless no issue at all.
 
Ok, I see.. I didn't root the phone. I just want to know. It's just I try to install Netflix in play store and the app didn't show.... So I install safetynet test and shows that it's not working... I don't have plane to root the phone. I only want to convert the phone to global... I don't know how to solve the issue of safetynet.. that why I ask you. Anyway the phone is working flawless no issue at all.
Ok so I check my Play Store Certification and I just found out that my device has not been certified which means that's the reason why you couldnt install/update Netflix.
 

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Yeah, that's what I told you. How can we solve the issue. It's the only bug I've found.
Download "Device ID" and copy Google Service Framework (GSF) and then paste it on this link
https://www.google.com/android/uncertified/ , just wait for Google to Verify your device. If it does not work then just download apk on apkmirror or revert back to T-Mobile ROM. I am in the process of trying to get mine also certified.
 
Nov 6, 2021
24
18
This worked for me, but had the same issue with the safetynet and thus can't use google pay. Just submitted the GSF for google to verify. Did google verified your device yet?
 
This worked for me, but had the same issue with the safetynet and thus can't use google pay. Just submitted the GSF for google to verify. Did google verified your device yet?
I changed my ROM to Pixel Experience because of OOS 11 battery issues and etc. But I dont think it did certify my device. Did some research on this before I switch and someone said it should certify your device but it wont say it. Another method I heard is to clear cache and storage cache on Play Store App and it should but I have never tested this one. The most sure method I saw was to root phone and bypass.
 
Nov 6, 2021
24
18
I changed my ROM to Pixel Experience because of OOS 11 battery issues and etc. But I dont think it did certify my device. Did some research on this before I switch and someone said it should certify your device but it wont say it. Another method I heard is to clear cache and storage cache on Play Store App and it should but I have never tested this one. The most sure method I saw was to root phone and bypass.
Yeah, I tried the play store app and gpay cache and storage cache clearing with no luck. I use gpay with NFC quite often so it was a bummer that it won't work without being certified. Thanks you for writing the guide regardless!
 
Yeah, I tried the play store app and gpay cache and storage cache clearing with no luck. I use gpay with NFC quite often so it was a bummer that it won't work without being certified. Thanks you for writing the guide regardless!
So sorry man. Thanks for letting me know it worked tho! You should try pixel experience tho. It is certified
 
Nov 6, 2021
24
18
So sorry man. Thanks for letting me know it worked tho! You should try pixel experience tho. It is certified
Yeah, everything else seems to work well besides that.

As much as I would like to try the other ROM, do they keep up with security patches? I just bought this phone used (Tmobile unlocked) and haven't rooted an android for a while and wasn't sure if they still get updates directly from google or some volunteer is maintaining the ROM. Would like to root it to whatever ROM that is the most maintenance free and would support security updates at least for a couple of years. I think oneplus support it up to 2023 for oneplus 8 if I'm not wrong.
 
Yeah, everything else seems to work well besides that.

As much as I would like to try the other ROM, do they keep up with security patches? I just bought this phone used (Tmobile unlocked) and haven't rooted an android for a while and wasn't sure if they still get updates directly from google or some volunteer is maintaining the ROM. Would like to root it to whatever ROM that is the most maintenance free and would support security updates at least for a couple of years. I think oneplus support it up to 2023 for oneplus 8 if I'm not wrong.
Yes they do keep up with updates but the people that are maintaing it are not from google. But I will assure you that it is way smoother and more optimized that the current oos 11. I also bought my phone recently 1 month ago as used! You can check some youtube channels if you are interested in pixel experience. Also changing rom does not require root so you dont have to tinker with safetynet and stuff
 

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Nov 6, 2021
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Yes they do keep up with updates but the people that are maintaing it are not from google. But I will assure you that it is way smoother and more optimized that the current oos 11. I also bought my phone recently 1 month ago as used! You can check some youtube channels if you are interested in pixel experience. Also changing rom does not require root so you dont have to tinker with safetynet and stuff
Wow, that looks really good. I might just try that out instead of going back to t mobile stock. Thank you!!
 
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Wow, that looks really good. I might just try that out instead of going back to t mobile stock. Thank you!!
Here are the instructions and Follow THE GUIDE AND I MEAN IT: https://wiki.pixelexperience.org/devices/instantnoodlep/install/

you have to be in the latest oos 11 and in the last part of the guide, you can lock back the bootloader by replacing avb key with a custom one. If you dont update to the latest. It will keep saying system ui not working. Learned it the hard way and was hard stuck for 3 days lol. The os itself is directly from the pixels but with added features that was unique from oxygen os so google will think you have a pixel.
 
Nov 6, 2021
24
18
Here are the instructions and Follow THE GUIDE AND I MEAN IT: https://wiki.pixelexperience.org/devices/instantnoodlep/install/

you have to be in the latest oos 11 and in the last part of the guide, you can lock back the bootloader by replacing avb key with a custom one. If you dont update to the latest. It will keep saying system ui not working. Learned it the hard way and was hard stuck for 3 days lol. The os itself is directly from the pixels but with added features that was unique from oxygen os so google will think you have a pixel.
You are a godsend sir!! Looks like I'll be tinkering with it tonight! Thank you so much!
 
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  • 1
    yeah in my experience on oos 12 but it was gone after c.16
    Thanks for the quick response. I'm on IN2015_11_C.16 as well. Hopefully it goes away after the next update.
    1
    yikessss, can you backup everything and maybe downgrade to oos 11?
    I'd probably have to msm back to T-Mobile software and decide if I want to try converting to global again... Ugh... PITA!

    I just looked at my info and for some reason it says I am still on c.16, but I know I had told it to install c.20, so something is borked up....

    Cheers,
    B.D.
  • 11
    The required files will be attached in the end of this guide.
    OnePlus 8 TMobile to Global Fastboot ROM
    MSM TOOL for IN2017

    Alternatives from the files above, if you get errors every time you are trying to flash like "NO SIM INSTALLED"
    (THIS IS WHAT I PERSONALLY USE):
    MSM TOOL for IN2017 Alternative
    OnePlus 8 Fastboot ROM Alternative

    1st Step: (Make sure Test Mode is ON and Driver Signature is OFF)
    First install the Drivers of the phone and the Qualcomm Drivers inside the DRIVERS.zip attached to this thread.

    2nd Step: Make sure your OnePlus 8 IN2017's bootloader is unlocked- unlocking bootloader will result to factory resetting your phone. Please backup your phone before doing this process. Instructions on how to unlock

    3rd Step: After the bootloader is unlocked, you have to enable "USB Debugging" and reboot your device to Fastboot Mode.

    4th and Last Step: Unzip the ZIP file and Open the Global Rom (10.5.12 OnePlus 8 Global Rom). Find flash-all.bat and double click on it. Type and enter Y when it asks to and just let it do its Terminal Process.

    **After the batch file is done, your phone should automatically boot to Global Rom Oxygen OS and no more of that T-Mobile
    splash screen.

    This is a YouTube walkthrough video on how to do it: Credits to Fizzy Apps on YouTube


    DO NOT LOCK YOUR BOOTLOADER YET, TO LOCK BOOTLOADER (THIS WILL WIPE EVERYTHING):
    -Download the latest OxygenOS 11 ROM
    -Move the downloaded ROM from "Downloads" folder to "Internal Storage"
    -Go to settings and find System Update, then press Local Update and choose the downloaded ROM
    -After its done installing, click REBOOT/Restart the device
    -After rebooting, go into FASTBOOT MODE and when you are in FASTBOOT MODE, type "fastboot oem lock"
    -Press the volume buttons to select LOCK BOOTLOADER and there you go, LOCKED Bootloader!

    IF SOMEHOW YOU GOT "QUALCOMM CrashDump Mode" during the 4th step or you locked Bootloader right after flashing ROM and it got corrupted.

    1) Enable Test Mode and Disable Driver Signature Verification on Windows PC.

    2) On your phone, simultaneously press and hold Volume Up (+) and Power Button and when the screen shuts down, IMMEDIATELY release both buttons. This means you forced shutdown the device.

    3) Set year date on your PC to 2017 and Turn off WIFI for MSM Tool to work and after doing this, open MSM TOOL folder you downloaded at the top of this guide and click MsmDownloadTool V4.0.exe

    4) On Login, set user type to "OTHER" and click next. at the top left side find "TARGET" and set it to O2/TMO

    5) While simultaneously holding both the volume buttons, connect the phone to the PC. As soon as the phone is connected, a COM# like COM3, etc. will appear on the MSM Tool and immediately click ENUM, then click COM#, then Start. (If COM# doesn't show up just continue to click the ENUM button during process and it should show up)

    <A YouTube Video walkthrough of this process> Credits to Shahin Shaan for this.

    **This should start the process of restoring your phone back to OxygenOS 10 and you have to start back to square 1 in order to flash Global ROM again. So, USB Debugging>Fastboot Mode>Unlock Bootloader>Enable USB Debugging Again>Boot again to Fastboot>Double Click on flash-all.bat on Global ROM folder. Also, I added TOOL ALL IN ONE which should make unlocking bootloader, booting to Fastboot faster.



    Credits to these amazing people for making this possible:

    @matteosaeed and his Guide.
    •Ms. user_ajusee's Guide
    •Mr. gregoryaul (@Aulgreg38) from HighOnAndroid Forums
    •THE MAN HIMSELF: Mr. Max Lee himself of HighOnAndroid Forums; link to his YouTube channel.
    10
    I tried again, MSM to 10.5.7, unlocked bootloader, rebooted to bootloader, flash-all.bat, and I'm still getting errors on the critical partitions. And I can't figure out how to unlock the critical partitions (probably not allowed in TMo firmware).

    I'm going to MSM to 10.5.22 and see if that makes any difference.

    EDIT: No dice. 10.5.22 made no difference. The issue is the locked critical partitions. If anybody has any solutions please tag me.
    Sorry for spamming the board today, but I think I figured it out.

    Thanks to @thattechguy_69 for all the work here so far. This is just to help anybody who is having issues like I did.

    The "critical partitions" issue appears to be a DRIVERS issue, not a fastboot version issue or anything else with the actual phone or ROM files. I had installed all of the drivers that every guide said to install, but I stumbled upon this post by @FoxyDrew that solved my issue.

    Here's how I finally got into 10.5.12.IN21AA (Global ROM) on my IN2017:

    1. Just to be safe (not sure if it's necessary) boot into TEST MODE on your Windows machine. I did all of this from Test Mode.
    2. Download the files from the zip attached at the bottom of the first post on this thread. Install both files (OnePlus USB Drivers and QDLoader HS-USB Driver).
    3. At some point I THOUGHT I installed the Fastboot drivers, but maybe I messed that part up or maybe it was before I was in Test Mode. Regardless, download the Google fastboot driver zip in this post. Unzip it to your desktop.
    4. Open the extracted folder and then the usb_driver folder inside, then right-click on the android_winusb.inf file and select Install. Confirm the installation.
    5. Plug in your phone.
    6. Open Device Manager. Your phone should show up under "Universal Serial Bus controllers" as "IN2017" when it is in CHARGING ONLY mode, and under Portable Devices when in File Transfer mode or PNP mode. If not, you'll need to fix your USB drivers from step 2 above.
    7. Make sure you can get adb commands to work, then reboot to the bootloader ("adb reboot bootloader" should get you to the FastBoot Mode menu with the big green "START" banner at the top) and make sure fastboot commands also work ("fastboot devices" will show you if your phone is detected properly).
    8. Check Device Manager again while in bootloader mode - your phone should now show up under "Android Phone" as "Android Bootloader Interface." If it shows up as IN2017 with an exclamation mark, you need to fix the issues with the fastboot driver in step 4 above. I actually did this step while at the "waiting for device" message while flashing the Global ROM and it kick-started the installation's second phase.
    9. I also followed some steps from this post by @awsan - I copied the entire platform-tools folder that I downloaded from his post (r31.0.2) into the 10.5.12-GLOBAL folder, replacing all duplicate files. I don't think booting into fastboot like he says to do (language selection splash screen) worked, I had to boot into the bootloader from there to get the flash-all.bat to start.
    10. From here, I think I just double-clicked the flash-all.bat and everything worked properly - with the note that I was stuck at "waiting for device" after the first reboot command in the middle of the installation. The process in step 4 got me through this.
    This fixed my issues with not being able to flash critical partitions (because I suspect they re-lock when fastbootd switches into bootloader if you manually do it). Now it doesn't hang at all. I am going to play around with this to make sure I didn't miss anything and see if it works with other TMo firmware versions and the newer 11.0 Global ROM.

    I have not tried locking the bootloader yet.

    Oh, and 5G and VoLTE both appear to be working.
    4
    I managed to successfully convert my OP8 to the global version this morning.

    Here are a few things I can confirm:

    - 5G and VoLTE are working on my device (Rogers network in Canada)
    - Banking apps work as expected
    - Widevine certification is exactly as it was prior (L1), meaning I can stream in full HD/HDR with Netflix
    - I was able to OTA update to the latest 11.0.10.10 without any issues at all

    My first attempt trying this was a month ago. I was lazy and didn't roll the phone all the way back to Android 10 using the MSM tool. So I tried using "flash-all" with a newer global package and it did not work (crashdump error). Figured it was worth a shot... for whatever reason it just doesn't work. Ended up restoring with the MSM tool.

    This time, I did this:
    1. Reverted back to official T-Mobile Android 10 using the MSM tool
    2. Unlocked my bootloader using the all-in-one tool + my unlock token
    3. Used the all-in-one tool to flash the global fastboot ROM (Android 10) linked in the original post
    4. Manually flashed the EU update from the device (also linked in original post)
    5. Locked the bootloader using the all-in-one tool
    6. Used the Oxygen Updater app to download the latest global full release (11.0.9.9) and installed it from my device
    7. Performed an OTA update, bringing me to 11.0.10.10
    Sorry for the long post. I thought it might help someone else out since I modified a few steps from the original post and found success with this approach.
    3
    Thanks for the guide!! I just submitted my request to T-Mobile to unlock my boot loader so now I play the waiting game... 😴
    In the meantime, can someone please clarify what does converting from IN2017 to International achieve? Ultimately my goal is to flash a custom ROM - not sure if I can do this directly after unlocking my boot loader.
    IN2017 is Tmobile version of the phone and updates are late and you cant sideload an update because it is not available on carrier versions of the phone. Converting it to International version gives access to the latest updates, and some other features that weren't available to Tmobile version. If you do this method, you will lose Safetynet which is the ability to use bank apps and etc. So after converting you have to lock the bootloader if you wish to do anything related to banking.
    3
    I am confused between this guide and the old one " Covert to Global ( WIP ) . Which one is best guide to convert OP8 TMO Android 11 to Global ?
    Should I back up/ change modem with this guide ?
    Is there diff between EU and Global ROM/modem/etc. to use 5G in USA and other oversea countries ?
    I want Always On Display ( AOD ) , which ROM EU or Global will have it ?
    TIA

    Yeah, it's not entirely clear to me, either.

    This is what you should do:

    (1) Put your phone back on Android 10 TMobile firmware using one of the packages with msmdownloadtool. I used 10.5.7

    (2) Unlock bootloader.

    (2*) Get TWRP boot image. Put phone in fastboot mode, type:

    fastboot boot twrpimage.img

    After TWRP boots, take a backup of your persist and modem partitions (I recommend using dd to do it, here's an example: dd if=/dev/block/boot device/by-name/persist of=/sdcard/persist.img.ext4). You could probably use TWRP to do the backup, but that's on you. Transfer them off of the phone and safeguard them.

    Now reboot from TWRP to fastboot mode. Unlock the bootloader, reboot to fastboot mode, and flash a 10.x euro or global ROM with fastboot. The guide says Euro, but I suspect you could use global, also. The goal is to have it running 10.x firmware (that's not for a carrier variant). After that boots, download the latest global OTA zip onto your internal sdcard. Open the updater in Settings, then select the file. After it updates, reboot to see if everything is OK. If it is, boot to fastboot and relock the bootloader.

    The