I have an ipad 1 that I bought new in April 2011 that has been connected to ATT 3g since purchase. Yesterday it suddenly began having trouble connecting to the cellular service. I took it to an ATT store and they replaced the SIM card, but that has had no effect on its operation. It will *occasionally* connect to the service as I drive around town. When I try to access the web or something, it always says unable to connect, but then out of the blue, I will sometimes hear the chime that it downloaded new email so I know it somehow managed to connect. Its like the antenna has extremely reduced power and maybe only when I pass the strongest towers is it able to make the connection. I am outside my warranty period so I can't even talk to Apple about it. I already tried resetting the network connection to no avail. Has anyone else heard of the radios just dying or suddenly losing 95% of their strength? Would restoring the ipad help? If so, what exactly are the instructions for doing that?