:)I an very new at this so please excuse my questions. I do have AT &T just for my IPAD and I noticed that it isn't working because I don't see the AT&T name in the corner and it says no service. Is there something that I have to do in my settings? It was showing at one point...Thanks so much
Go into Settings >> Cellular Data, and make sure it is turned on.
If it is, go ahead and try restarting the iPad. Hold down the power button for about three seconds, until the power off slider shows up. Slide it off and wait until it finishes shutting down. Then hold the power button again, about three seconds, until you see the Apple logo.
Give it a little time to reboot and find the network. Hopefully that does the job.