1. Switch the phone again.

2. Turn off the automatic brightness level function, and drop down the top curtain menu-remove brightness to automatically check.

3. Eliminate the splash screen caused by third-party application conflicts. Back up mobile phone data (phone book, SMS, multimedia materials, etc.). ) and try to restore the phone to the factory settings.

If the problem still exists, it is recommended to take the purchase invoice and maintenance card and send the mobile phone to the nearest Samsung service center for testing.