Did some searching but couldn't find anything on this. So I signed up for 3G on my iPad March 18th. It was set to expire yesterday (17th). I had previously cancelled the plan so it would not auto-renew. So yesterday comes and goes, data still works, today, day 31, data is still working. The countdown on the iPad Data account shows 0 minutes remaining. Has anyone else experienced this? Is AT&T going to find a way to charge me for this data that has been used even though I had not signed up for it? Thanks in advance!