Can anyone tell me why I have an AT&T wireless phone that can't receive calls from AT&T land line customers in my local calling area? It started happening about 2 months ago out of nowhere. All other land line carriers and wireless carriers can get through with no problem. The wireless side of AT&T say it's a carrier problem for the people who are trying to call me. Um, hello, the carrier is AT&T. Why doesn't the switch recognize my cell number and how can I get AT&T to fix it?