The official method is blocked by Black Shark’s customized bootloader.

—usually by holding the Power and Volume Down buttons—before being connected to the Mi Unlock Tool 3. Critical Considerations and Risks

On his PC, Leo launched the Mi Unlock Tool . He logged into his account and connected the cable. The progress bar crawled forward: 10%, 50%, 90%... finally, a bright green checkmark appeared. Black Shark 2