I heard before I got my iPad that although it wasn't on a contract once you sign up for a data plan it would auto renew every month. So when I got my data plan I was watching the days to cancel the plan before it auto renewed. However it stopped working 30 days after I started the plan. I waited for a week to see if it would auto renew but it didn't it just stayed off until I renewed it on the iPad which is the way I hoped it was going to work in the first place. I was also glad to see that if you get to the limit of the plan data would stop unless you upgraded or renewed. Is this the way your data plan works? Give me some details?