Early this moring my ppc 6700 would not make or receive calls, when someone call me it goes stright to my voice mail, and when i tried to call out it would say dailing and did disconect. I called sprint to ask if the something was wrong with the service and they said no. We rebooted it and still did not work. After I got off the phone I did a hard reset and then it started to work again. Can someone please let me know what they think what the problem was, so it would not happen again. Thank You!