1. iPhone comes with ringtones that sound for incoming calls, Clock alarms, and the Clock timer. You can also purchase ringtones from songs in the iTunes Store.
   
2. Set the default ringtone:
   
   Go to Settings > Sounds > Ringtone.
   
3. Assign different ringtones for the special people in your life:
   
   From the home screen, swipe to next page (right to left), go to Contacts > select contact > Edit > Ringtone > select ringtone > Done > Done.
   
4. Turn the ringer on or off:
   
   Toggle the Ring/Silent switch on the side of the device.