Hello: I'm very sorry. According to the situation you described, I suggest you: 1. Check whether the third-party software is newly downloaded and installed on the mobile phone. It may be that the software is incompatible with the mobile phone, so I suggest you try to uninstall it (Settings-Application Manager-Select Download-Uninstall); 2. If it doesn't return to normal, I suggest you back up your mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore the factory settings (Settings-Reset-Restore Factory Settings); 3. If the problem still exists, it may be that there is something wrong with the mobile phone system software. It is recommended that you take the mobile phone three-guarantee certificate to the nearest Samsung service center for testing. Please visit:/support/location/supportservice.do for the specific service center address? Page = service. Location and place. Cid = cn _ PPC _ support _ service _ repairnet _120522 welcome to Samsung digital service platform: /ask.