Was playing around with the "customize" button and all of a sudden the fieldtest button appeared. Was trying to make it dissappear by choosing the button and reverting back to default. In the event of doing that, all my buttons are gone now when i slide to unlock the phone. Can't dial out or send texts , basically receive calls b/c i have no buttons.. All I see is the background and it says ipod on the top left corner and the wifi connection.. need help !!! Thanks