So ive been noticing that my phone would do this atleast 7 to 10 times a week. Where I would be using my phone for normal day uses, or even just sitting there idle. I would feel/hear a vibration then the phone just shuts off and turns back on. I did notice that I do lose some of my recent texts/calls prior to the phone restarting itself. BTW I have my HTC 8x through T-Mobile. Ive already had this phone replaced once with a brand new unit, but Im sure if I call it in theyll just send me a refurb. Any idears?