So my mom just got a 3G iPad, which I think will be great for her. She is just planning on getting the 250MB 3G plan, but I was kind of curious if, say we were on a long car ride or something and I wanted to play with it more excessively if I could pop the micro-SIM out of my iPhone 4 and put it in and it use my data instead while I have it in. Not a huge deal if not, but hey, if it works, why not?