Find "Volume"
Press Menu.
Scroll to Settings and press the Navigation key.
Scroll to Sound profiles and press the Navigation key.
Highlight the active profile and press Edit.
Scroll to Volume and press the Navigation key.
Set ring volume
Scroll to Call alert and press Navigation key right or Navigation key left to adjust the required ring volume.
Save and exit
Press the Navigation key to save the setting.
Press Disconnect to return to standby mode.