This morning, dialing relatives, I could hear the beeps as I touched each number. This afternoon, when calling another, there were no beeps - but I could hear the rings and her voicemail picking up the call. I'm presuming she got my voicemail message as well... I'm an iphone newbie and apart from removing a encase backup battery/shell which got returned, I've not been anywhere near the configuration. I also checked the main volume controls and all are set to max. What could I have unwittingly done? Thx!!