I can't seem to figure out how, but I recently met this girl, and we've been talking on the phone in the evening, and sometimes, I'll hear her voice coming from my pocket, and I'll dig my phone out and she'd be (at 2 am mind you) on the other end laughing at my horrible singing or whatever I was doing in the car. I called her 6 times yesterday from my pocket! Phone is locled and everything, 3 days ago, it was my mother. It's always the last person that called...so I can't understand how a locked phone is calling people like this!
If you double-tap menu, it unlocks the phone. Now it's unlikely, but possible. Try setting a lock pattern (settings > security > require pattern), and see if it still happens.
I'm saying that my phone has done this sitting on my bedside table while watching a movie...not been touched for almost 2 hours.
