Setting ring tone
With P525 you can add and configure your favorite music as your phone ring tone. You can easily configure your favorite song our sound as your ring tone with the following compatible audio formats: .mp3, .wav, .wma, and .mid.
Adding ring tone to selection
To add ring tone to the selection category under phone setting:
1.Tap Start > Settings > Personal > Ringtone icon.
2.Select a specific file extension from the list box.
3.Tap to check a ring tone file that you want to add.
Tap 
to try ring tone sound and tap 
to stop.
