It is possible that the plug-in caused the camera to flash back.
If the problem persists, please restart the phone or back up important data, and restore the phone to factory settings.
If the problem still exists, it is recommended to go to a nearby repair shop for repair.
Huawei mobile phone factory settings are as follows
1. Click to enter the settings.
2. Click to enter backup and reset options.
3. Click the Restore Factory Settings option.
4. Slide the contents of the window to the lowest level, and then click Reset Phone to restore the factory settings of the phone.
Attention; The above methods are risky, so please use them with caution.