Find "Phone Ringtone"
Scroll to the profile icon and press the Navigation key.
Scroll to Change Sounds and Alerts and press the Navigation key.
Scroll to Phone Ringtone and press the Navigation key.
Select your ring tone
Scroll to Ringtone 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 the Menu key.
Scroll to Save and press the Navigation key.
Press Disconnect to return to standby mode.