I had a very interesting week with my ZF2 (2GB, 32GB, purchased in Taipei week before launch here). Been very happy with it, but on the trip back from Bintan last week, while on the ferry and holding the phone in my hands watching TV (my hands were on the sides of the phone), I felt a buzz. This is the same buzz that precedes a Power-Off or Restart.
I look at the phone and the little Android man was there, and underneath were the words "Erasing". I did not have a good feeling, and I was right.
After almost 30 mins, I had a freshly deleted phone. Everything in internal storage was gone, and I had no idea what happened to trigger it! I have erased/reset my phones many times, but each time I had to either select it deliberately and/or key in a pin. I've never had it start by itself.
Lost almost 6 weeks worth of WhatsApp. Fortunately, my photos are backed up via Google+ Photo's.
daniel
Upper Changi