So I just got off the phone with AT&T and found out that if you own an AT&T iPad and you use the AT&T service once, from that point on you need to activate the service at least once every 60 days, or else they will disable your SIM card.

Now here's the kicker. If you do want to activate your account after 60 days of inactivity, you need to get a brand new SIM card from them for $25!!!

So much for an on-demand internet service.