Turn GPS on or off
Turn screen lock on or off
Change screen brightness
You can select the ringtone you want to hear when you get a call.
Find "Phone ringtone"
Slide your finger downwards starting from the top of the screen.
Tap the settings icon.
Tap Sound & notification.
Tap Phone ringtone.
Tap the add ringtone icon and go to the required ringtone.
Tap the required ringtone.
Return to the home screen
Tap the Home key to return to the home screen.
Tap anywhere to dismiss
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