User Guide

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If users choose the ringtone provided by phone default, please refer to
Sound & notification settings.
If users choose the music downloaded from the Internet as a ringtone,
please follow the below steps:
Click -> Music icon .
View the music list in App, touch and hold a music, and then In the
pop-up menu options, click Use as phone ringtone.
4.14.5. Backup & Reset
Click Setting .
Personal->Tap Backup & reset.
Personal data-> click Factory data reset.
Check Erase SD card-> click RESET DEVICE label-> tap ERASE
EVERYTHING label.