I got my 820 about a week ago. Today when I came home I sat my 820 on the table, came back to see if I had any messages. The phone had seem to shut itself off. I pressed the power button but nothing happened. So I did a "Blackberry" and pulled the battery out, then back in, powered it up and now it's back to normal. This has happened twice already. The phone was at 92%. Any one have similar issues? Bad battery? Bad phone?