Go back to > Additional Settings > Developer Options . Enable OEM Unlocking and USB Debugging . 2. Bind Mi Account to Device In Developer Options , tap Mi Unlock Status . Tap Add account and device .
Unlike Xiaomi, Black Shark requires account verification via the "Mi Unlock Status" menu. black shark 2 unlock bootloader
Alternatively, the latest works for the Black Shark 2 if you use the "Add account" method first. Go back to > Additional Settings > Developer Options