Find "Incoming call"
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 Tone settings and press the Navigation key.
Scroll to Incoming call and press the Navigation key.
Select ringtone
Highlight the required ringtone and wait a moment to hear it.
Press the Navigation key to select the ringtone.
Exit
Press Disconnect to return to standby mode.