Whenever I have headphones plugged in, my phone starts doing things on its own. It appears that it does one of three things, that I've noticed: it calls the last person I called (most frequent), opens the voice command prompt (less frequent), or opens the clock settings (least frequent). This happens at a rat of 1-5 times per minute or more. Over the course of a 30 minute walk, it called the last number I dialed 50 times and that's only that action, it did the other two as well. This seems to happen regardless of what I'm doing, but I am typically listening to the Pandora app. What gives?