It will bypass the need to sim unlock before unlocking the bootloader, and will also bypass the need of an unlock token file from OnePlus (hence skip the wait period of 1 week to get the privilege to unlock). It will NOT sim unlock the phone.
1) Download the patched MSM download tool:
EDIT: 10.0.39 version: http://www.mediafire.com/file/vdphi4...0.0.39.7z/file
2) Run the tool, select "other" in "Login type", click Next, connect your phone in EDL mode, ensure the "sha256 check" is NOT checked, select "TMO" in the Target dropdown, click the Start button and wait until it's completed.
3) The phone will show a red warning saying "device is corrupt", just ignore that and wait some time. It will fallback in fastboot because it's not able to boot. Update your fastboot executable, otherwise fastboot might not recognise the following command. Download it here: https://dl.google.com/android/reposi...st-windows.zip. Now run the following fastboot command, and follow the instructions on the screen of the phone:
fastboot flashing unlock_critical
5) If you want to be able to boot, you'll probably need to flash again the boot.img of the rom. Download it here:
EDIT: 10.0.39 boot.img : http://www.mediafire.com/file/tt6c58...0.0.39.7z/file
And run the command:
fastboot flash boot boot.img