I just thought I would help put some minds at ease. I just got off the phone with my brother who works for AT&T to ask him about this. For the record, so far every bit of information he has told me has been 100% accurate. With that being said, he received an internal memo that stated to tell all customers if they are currently grandfathered in to an Unlimited data plan, upgrading to an HSPA+ device (Atrix 4G and Inspire) will allow them to keep their Unlimited Data. The above document is for the 4G (non HSPA+) plans, which he did in fact also confirm. So while this is something to worry about at a later point, this is not an issue for people upgrading to the Atrix. Of course new customers that is another story all together but not one that hasn't already been told.