1. From the home screen, drag down from the Notifications bar with two fingers to access the menu.
   
2. Tap SETTINGS.
   
3. Tap Sound.
   
4. Tap Phone ringtone.
   Note: You can only tap 'Phone ringtone' if the device is not set to silent or vibrate mode.
   
5. Tap the desired ringtone.
   
6. Tap OK.