If you have forgotten your PIN, pattern, or password, and you don't have access to the official partner method, performing a factory reset through Android Recovery Mode is the most reliable way to regain access to your device.
This method works universally on Sunmi devices, regardless of software version. It's essentially the same process used by Flipdish and other POS providers to reset their terminals. how to unlock sunmi v2 pro hardresetinfo verified
A hard reset (factory reset) will permanently delete all data, including apps, user data, photos, and configurations, from the device. If you have forgotten your PIN, pattern, or
Release the Power Button the exact moment the "SUNMI" logo appears on the screen, but keep holding the Volume Up button . If you have forgotten your PIN