Your phone uses sounds and vibrations to communicate with you, including ringtones, notifications, alarms, and navigation feedback. You can customize any of these sounds, as well as controlling their volume and the volume for music, videos, games, and other media.
Change default ringtone
To change the default ringtone for incoming calls:
.Touch a ringtone to select and hear it. Touch OK to confirm your
final selection.
To adjust the ringtone for an individual caller, go to that
person's contact card in the People app, touch Menu for that
card , and then Set ringtone.
Set ringtone to Vibrate
You have several options for controlling when your phone vibrates. To turn Vibrate on or off easily for incoming calls, follow these steps:
To change other sounds and vibrations, go to Settings > Device > Sound and touch the one you want: