UPDATE: We just confirmed this with AT&T and is 100% Valid. This is AT&T’s way of saying Thank You! They also confirmed you will not get charged for anything extra.
To get 1000 FREE AT&T Wireless Rollover Minutes Text message: Yes to 11113020 on your cell phone. Please Note: This may be for iPhone users only, but it is working for everyone.
(THANKS Hunt 4 FREEBIES!!!)