I have a Dell laptop that came with a sim card in it. The card actually says cingular on it. I took out the card, cut it down, put it in my iPad, and it wouldn't work.
I then went in and copied the settings that were on my laptop into the iPad and bam, I got internet with my laptop card.
After a few months, something happened and it stopped working, always giving me the error, "There is no data remaining on your current plan. Would you like to add more data now?"
When I put the sim back into the laptop, I get internet off it just fine, so there's nothing inherently wrong with the card.
I tried to go confirm settings under General > Network > Cellular Data Network, and there is no Cellular Data Network.
Did AT&T Enable something in the last 3-6 months that prevented me from using this card in the iPad? Is there any way to once again edit the settings and get the card working again?