The mobile phone suddenly beats and a red horizontal line appears on the screen.

If the mobile phone screen automatically jumps, I suggest you try:

1. Try to restart the phone.

2. Try to uninstall the recently installed third-party software.

3. Back up data (contacts, text messages, photos, etc. ) and try to restore the factory settings.

4. If the problem still exists, it may be a system or hardware problem. It is recommended that you take the machine, purchase invoice and maintenance card to the local Samsung after-sales service center for testing.