After turning on the rear camera, the device has an unknown error.

According to your description, I suggest you:

1. Settings (pinion icon)-Applications-Camera-Reset/Data Clear

2. Check whether the third-party software similar to the theme of the mobile phone or adjusting the screen brightness is newly installed on the mobile phone, which leads to this phenomenon. I suggest you uninstall it and see if the phone is back to normal.

3. Back up mobile phone data (phone book, SMS, multimedia materials, etc.). ) and try to restore the phone factory settings (Settings-Privacy/Reset/Privacy-Restore Factory Settings).

If the problem still exists, it is recommended that you take the three-guarantee certificate and send your mobile phone to the nearest Samsung service center for testing. Please visit the specific service center address:

. Samsung . com/support/service locations . ASP

Welcome to Samsung service to make an appointment:

/reservation

If you have any comments, suggestions and comments, please click: support.samsung.com.cn/survey.