Has anyone been experiencing any situation where your phone all of a sudden powers itself off, then turns back on? I've only had this happen one time to my phone, but my wife has had it happen at least four times already. I'm not sure if it has to do with location (it's happened two or three times where she works, and once at home; same place mine did it). I'm wondering if anyone else has experienced this, or may have some insight as to what may be causing it. Thanks.