So, I know how to cancel the iPad data plan, but I had a question on behalf of my grandma. She has a 3G + WiFi iPad and she recently purchased a data plan for her travels. Basically, we'd like to know, if she cancels the 250MB data plan before the end date, can she keep using the rest of the data for the rest of the month, or does it just cut off service right then and there. Thanks! I did some MRoogleing and didn't find what I was looking for. I probably could have tried harder, but I'm showing her some other features right now as well.