A: If you used a third-party service, contact them. If official, Sunmi may reissue it based on your original ticket.

Press and hold the and Volume Down (-) simultaneously for about 5–15 seconds.

Unlocking your Sunmi V1 device involves several steps, which are outlined below:

Certain versions of Sunmi firmware allow for a "clear emmc" option in a specialized factory mode, accessed by holding Power + Volume Down and selecting the "clear emmc" option when the drop sound is heard. 3. Bootloader and Custom ROM Unlocking

: Once the Sunmi logo appears, release the Power button but keep holding Volume Down until the Recovery menu appears. : Use the volume buttons to scroll to wipe data/factory reset and press the Power button to select it. Yes -- erase all data to start the process.