Just recently my 920 started acting a little crazy. Its a red ATT unit I have had since the release. When I attempt to open an app(email, wireless settings, people hub, ect.) many times it will just go to a black screen sometimes with the clock displayed at the top, sit on that screen for what feels like an eternity and then revert to the main screen. It will do this over and over until I restart the device. I tried removing any programs I had recently installed that didn't help. Any ideas would be greatly appreciated I'm restarting the 920 about 5 times a day :/ its been flawless till this point I love this phone.