recently my i560 has been giving me problems with service due to a broken antenna which was caused by one of the little rascals always running around my house..my sister has a used i560 which i bought from her. i thought using this phone would solve my phone problems but this phone had another problem..at the bottom of the home screen the words dc only are displayed, i'm not sure of what significance that is but the problem is that i cannot receive any calls, the phone never rings but it always displays a missed call..i tried changing the call waiting status to off but that did not make a difference either..any idea what i could do to fix this problem?