For info, just installed it on OP3... Made sure the device was on Oxygen OS 9.0.6. unlocked the bootloader Booted to fastboot - then booted TWRP 3.7.0_9 Formatted DATA Wiped Cache, Dalvik/Cache, Storage and System Rebooted to Bootloader (fastboot mode) Used Installer 0.11.2 to test and started the install - device got picked up, no need to select Left "wipe data" unticked Followed instructions and UT installed as expected (Xenial).