Find "Settings"
Press Applications.
Press Messaging.
Press the Menu key.
Press Settings.
Activate notifications
Press Notifications to activate the function.
When the box next to the menu item is ticked (V), the function is activated.
Choose message tone
Press Select ringtone.
Press Default ringtone or the required message tone to hear it.
Press OK.
Exit
Press the Home key to return to standby mode.