Find "Device sound profiles"
Press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to Device sound profiles and press the Navigation key.
Select message tone
Highlight the active profile and press Edit.
Highlight the field below Message beep and press Edit.
Highlight the different message tones to listen to them.
Once you've found a message tone you like, press the Navigation key.
Save and exit
Press the Navigation key.
Press Disconnect to return to standby mode.