Like many others, I took advantage of the free data T-Mobile was giving away when the iPad Air came out. Then last week, AT&T started offering a $100 bill credit for adding a device to your mobile share value plan. So I got an AT&T nano sim and added my iPad to my plan. Now I need to figure out how to cancel the T-mobile plan. I guess I could go into a T-Mobile store and do it, but I was kind of hoping to do it online.