The mobile phone has been switching between lock screen wallpaper and desktop wallpaper, and it can only be restarted, which is invalid. I can't get a phone call or a text message.

Samsung mobile phones generally recommend the following operations:

1, restart and try again;

2. Check whether the mobile phone has a system push notification, and if so, update the mobile phone to the latest system version.

3. Observe after uninstalling the recently installed third-party application.

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

If the problem still exists, it is recommended that you take your mobile phone, purchase invoice and warranty card to the local Samsung after-sales service center for testing.