I was trying to put a picture on my home screen. When I tried to save it the phone rebooted. It is a moto Razr 4G LTE. Menu bar works, it can receive calls but there is an error message that says Activity Home Screen (in application Home screen) is not responding. It gives the option to force close or wait. Can complete the phone call but then the screen goes black except the menu bar with the time, temp..... any suggestions?