My unlimited data renews monthly on the 29th without fail. Today it did not autorenew and when I attempted to add the data the unlimited data option is no longer there. After a few rounds with AT&T, who was trying to tell me that the Unlimited option goes away for 1 year, they bumped the issue up. Oddly enough by the time the supervisor got on the call the unlimited data option appeared. Turns out that they needed to add my IMEI back to the system, they said it was their mistake. I call BS.