05-13-2013 11:45 AM
There doesn’t seem to be a specific option to mute the dialing pad at the moment.
The workaround is to set 'Notifications' to 'Silent' to stop it making a sound. You can do this quickly by sliding down from the top of the home screen and touching the 'Notification' icon (looks like a bell with a line through it). It should then go from 'Normal' to 'Silent'.