WORKS ON ALL ONEPLUS DEVICES!!!This is only for devices that can boot into fastboot D THIS WONT WORK ON HARD BRICKED DEVICES!!!HAVEN'T CHECKED IF DOWNGRADE WORKS BUT FLASHING ANDROID 15 WORKS!!!!AND YES YOU CAN CHANGE REGIONS!!!YOUR DEVICE SHOULD BE UNLOCKED!!!!1) Install all the necessary drivers fastboot, ADB and others.2) download firmware flasher from here : https://xdaforums.com/t/fastboot-firmware-flasher-tool-and-a-short-guide.4717602/3) Enable USB debugging and go to...Read more