Find "Message alert tone"
Press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to Profiles and press the Navigation key.
Highlight the active profile and press Options.
Scroll to Edit and press the Navigation key.
Scroll to Message alert tone and press the Navigation key.
Choose message tone
Highlight the different message tones and wait a moment to hear them.
Once you've found a message tone you like, press the Navigation key.
Exit
Press Disconnect to return to standby mode.