In the previous thread , we discussed a method to convert T-Mobile 6T's to the international variant, sort of, but it required an unlocked bootloader, which itself requires a SIM unlock which T-Mobile gives people a hard time about.However, it is through @ Dark Nightmare and @ iaTa 's efforts that we've come this far. Today, I share with everyone a new method to turn a T-Mobile 6T into an international variant. One that doesrequire an unlocked bootloader or a SIM unlock!Following the steps below. PleaseHere are the steps:1) Download 6T MsmDownloadTool v4.0.58 (OOS v9.0.11) provided by @ iaTa 2) Download patched flasher tools here: https://drive.google.com/open?id=1dY...EBOjau1BRvtnJQ (the patches simply remove checks that allow all the images to be flashed on the phone, I've personally tested the "MsmDownloadTool V4.0_factory_patched.exe" but not the "MsmDownloadTool V4.0_factory_mcl_op1_patched.exe" variant. You can do a binary diff on the EXEs against the originals in case there's any issues with trust.3) Shut down your T-Mobile 6T completely4) Press and hold Volume Up and Volume down keys simultaneously5) With those two buttons held down, plug in your USB cord to your PC6) Ensure that the USB drivers for Qcom download mode are installed and working (available in the MSMDownloadTool thread)7) Extract the patched tools EXEs to the same directory as where you extracted the MSMDownloadTool8) Run "MsmDownloadTool V4.0_factory_patched.exe" (or the other one, if you're feeling adventurous)9) Click "Start" when you're ready to start patching the phone10) After about 5 minutes it will finish its job and reboot the phone11) Phone will boot normally, but no more T-Mobile logo, and instead there is the OxygenOS generic logo12) Now your T-Mobile 6T is now running identical software to the unlocked 6T sold directly by OnePlus, and running the latest software (OxygenOS 9.0.11 at the time of this writing). You can even participate in Open Betas if you'd like, and the "Local Upgrade" feature is now enabled and working.13) ???14) ProfitHope this helps somebody out.It definitely works.