Hey Max, if you don’t mind, you can put this guide for people to convert their T-Mobile OnePlus 8 to international firmware.
Make sure you have DRIVERS installed! Both ADB and OnePlus.
Current Qualcomm Drivers just in case you can’t convert.
You can use the Universal adb drivers from Max here on HighonAndroid!
- Get your Sim Unlocked through T-Mobile then proceed to get unlock token from OnePlus (request takes 7 days to be emailed to you), then unlock bootloader using Fastboot oem unlock.
OR use “TOOL ALL IN ONE” to flash the token under 5 seconds.
THERE IS A GUY ON XDA WHO DOES FREE T-MOBILE SIM UNLOCKING SINCE THE T-MOBILE ONEPLUS 7 PRO (@mobbdeep), BUT CURRENTLY CLOSED HIS PRIVATE MESSAGE BUTTON DUE TO TONS OF REQUESTS.
ONCE YOU RECEIVE YOUR UNLOCK TOKEN, CHANGE THE NAME OF THE FILE FROM “unlock_code.bin” to “unlock_token.bin”
Steps to Unlock Bootloader BEFORE converting!!! Can also follow these same steps to re lock bootloader.
Link to OnePlus to request Unlock Token.
Unlocking method Method #1: Power off your phone completely! Connect phone to pc, and enable Developer options and turn on OEM Unlocking, USB DEBUGGING. Select TRANSFER FILES in “Android USB Configuration” dialog box after enabling USB DEBUGGING.
Put phone in fastboot mode (Bootloader): Press and hold the Volume Up’, ‘Volume Down’, and ‘Power’ keys together to enter Fastboot Mode.
Open Command Prompt (CMD) on a Windows computer and type these commands:
fastboot flash cust-unlock <unlock_token.bin>
fastboot oem unlock
and now your bootloader is unlocked.
Unlocking Method #2: ONLY IF YOU USE “TOOL ALL IN ONE”
Put phone in Fastboot mode (Bootloader)
Download and Install the “TOOL ALL IN ONE” program on your computer.
Click BRANDED DEVICE
CLICK the Three … (DOTS) and select the Unlock Token from your computer wherever you put it.
Then installation proceeds.
Grab any of the firmware from XDA under ONEPLUS 8 folder then download to your PC and EXTRACT.
NO NEEED TO BACK UP FINGERPRINT PERSIST IMAGE!
Open the folder “10.5.12” FOR EXAMPLE
Double-Click FLASH ALL, and when it says Wipe, type Y and let it RUN. Process takes around 10 minutes. Phone will reboot few times during the process.
IF you want to re lock the bootloader while on International firmware (Global), take the latest OTA update which is Oxygen OS 11, while on 10.5.12 Fastboot ROM.
Once downloaded and Installed, lock the bootloader either when it’s booting up or after. By going in
to Fastboot mode and activating the re lock.
Video if you’re stuck:
Hope this helps.
Here is also the link to XDA for the MSM
DOWNLOAD TOOL in case your T-Mobile OnePlus 8 gets BRICKED or if you WANT to go BACK to stock.
This is the password to get the file. There are 3 versions of T-Mobile stock Oxygen OS firmware which is why there’s a password to access.
Password: N3v3r S3ttl3 tm
I recommend T-Mobile software version: 10.5.7!!!
ON THE FIRST PAGE !!