So this has happened to me 3 times now within the last two days. I go reach in my pocket to use my iphone and notice that it is powered off. I try to press the power button to turn it on, but nothing happens. So my first guess is that it is out of power so I plug it in to the charger but the phone doesn't do anything. No buzz, beep or power icon on the screen. I do a reset (power button plus home button) and finally the apple logo shows up and the phone is back in line. The second time this happened, the phone turned on after the fourth or fifth reset attempt. The third time this happened (today), it wont reset. All three times, I have at least 50% battery. So now I have an appointment with a mac genius. Has this happened to anyone? Is there anything else I could try?