I've had my phone for about one week. In the last couple of days it's frozen on me three times. Each time it has happened after I exit an application and return to the home screen. When I return to the homescreen, I try to touch an icon and everything is frozen up. I have to power the phone off and back on for it to work again. Can anyone offer any input, or suggestions as to why this might be happening? p.s., I do have the latest version of the software. Thanks.