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" .
Unlocking your bootloader is the first step toward advanced customization, including rooting, installing custom recoveries like TWRP, or flashing custom ROMs. mi unlock 6.5.406
Plug your phone into the PC. The tool should display "Phone connected" . You must link your Mi Account to your phone
You can find this specific version on reputable community mirrors: Download Mi Unlock 7.6.727.43 for Windows | Uptodown.com installing custom recoveries like TWRP
Uses Xiaomi’s official servers to verify your Mi Account and device binding.