AT&T offers double the data in promo that runs through Halloween
AT&T is doubling the data on Mobile Share Value Plans with two or more lines
As long as current AT&T customers with the Mobile Share Value plan follow the above directions, they will get to keep the extra data each month forever, or at least until they switch carriers. And the additional data won't cost subscribers any extra money.
Sounds like a great opportunity for those already signed up with the nation's second largest carrier., or for those seeking a new mobile operator. Remember, the offer doesn't start until tomorrow.
source: AT&T via BGR