I have been using the X since the launch day and I have been very happy. Today while I am on the phone, it just dropped the connection and since then it won't make a call nor receive the call. I am on ATT. the phone just ring for one sec and dropped. When I tried to make a call, it rings then drop immediately. Has anyone seen this? I reboot the phone twice already.. still no go at the moment.. I am wondering if the something the tower or carrier?