I imagine the answer to this problem is somewhere in the manuel, or in this forum, but I can't find it, or don't know what to look under. When I place a call on my iphone and put the phone to my ear...my ear will put the call on Mute, Hold, Speaker, or punch numbers on the keypad. I have even dialed other numbers while I am talking to my original call. I've tried going back to the home screen after I place a call, but that seems to be where I most often dial somebody else. This happens on probably 80% of the calls I make. It's absolutely maddening!! Can one of you kind souls enlighten me? Thanks.