Mi Unlock 6.5.406 [portable] -

Plug your phone into the PC. The tool should display "Phone connected" .

You must link your Mi Account to your phone. Go to Settings > Additional Settings > Developer Options > Mi Unlock Status and tap "Add account and device" . mi unlock 6.5.406

Unlocking your bootloader is the first step toward advanced customization, including rooting, installing custom recoveries like TWRP, or flashing custom ROMs. Plug your phone into the PC

This is a mandatory security wait time imposed by Xiaomi. There is no official way to bypass this. installing custom recoveries like TWRP