1. Added a new thread.
Menu-like feature that runs along with fastboot mode you can just trigger these
Functions while in Fastboot (i.e no need to force power off)
UP - Continue to System
Down - Boot to Recovery
Power - Turns off device
2. Removed/Patched fastboot restrictions like
FAILED (remote: 'not support on security')
fastboot: error: Command failed
So some restricted commands will work
How to flash?
fastboot flash lk lk-rui3-menu.imgor
Recovery flashable version
Screenshots