Last night my SIM card stopped being read and I went to AT&T and got a new one. I discovered this morning that when I left my home and came off WiFi, I was not getting Internet access on 3G nor on EDGE. The icons weren't showing up either to indicate if I was on one of these networks. I went to AT&T to get this checked out and they told me there's a network problem and there's currently no solution. I am now on hold waiting to talk to customer service because my other friends with iPhone 3G are not having any network issues. Has this happened to anyone else yet? Should I attempt to do anything with the phone to get it working again? My $30/mo is wasting away with no Internet on the go