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3.6.5 Backup and reset
- Go to Settings => Backup & reset => Restore factory settings
- This action will erase the following data:
System and application data and settings
Download the app
- It does not erase the following data:
Current system software and bundled applications
SD card files, such as music or photos
3.6.6 Ringtone
Go to Settings => Sound, you can set the volume, mute mode, ringtones and other
