[shaggylive]

while your problem might be static (try a piece of fabric softner in the pocket)

I had this problem with my main phone with my extended battery, but not my other phone. if it got bumped wrong it would shut off. I narrowed it down to the battery being slightly shorter and in that phone it was just enough. I put a small peice of black tape on the battery and problem is solved.. I still found it strange only 1 phone has the issue though. probably just wear on the contact springs, they've had a year of abuse by now..