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 volume
Highlight the field below Ringtone volume and press Navigation key right or Navigation key left to select the required ring volume.
Save and exit
Press Options.
Scroll to Save and press the Navigation key.
Press Disconnect to return to standby mode.