Find "Customize"
Press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to User profiles and press the Navigation key.
Highlight the active profile and press Options.
Scroll to Customize and press the Navigation key.
Select ring tone
Highlight the field below Incoming call and press the Navigation key.
Highlight the different ring tones to listen to them.
Once you've found a ring tone you like, press the Navigation key.
Save and exit
Press Options.
Scroll to Save and press the Navigation key.
Press Disconnect to return to standby mode.