What's the matter with Samsung's SMS and phone book flashing back?

It may be caused by system or hardware problems.

1. Uninstall the recently installed third-party software, and initially eliminate the causes of system software conflicts.

2. After taking out the external SD card, test whether there is a restart phenomenon.

3. Back up mobile phone data (phone book, text messages, pictures, etc. ) and restore the phone factory settings (enter phone settings-reset-restore factory settings).

If there are still problems through the above methods, it is recommended to send the mobile phone to the nearest Samsung service center for testing.

According to your description, I suggest you try the following methods: 1, Settings-Application Manager-All-Information-Erase Data 2, Settings-Application Manager-All-Phone Book-Erase Data 3, and restore the factory settings after backing up the important data of the mobile phone. Attempt to set-reset-restore factory settings (troubleshoot software problems). If the problem still exists after the above operation, it may be a system or hardware problem.

Please click the following link for the specific location of Samsung Service Center:/support/location/supportservice.do? Page = service. Location and place. cid = cn _ PPC _ support _ service _ repair net _ 120522