I found a link to what I was talking about in the other post, where I stated I thought it odd I wasn't seeing any comments at all about ATnT's promo double-your-data plan for Family Share plans:
If you are on 15 gigs or more on the Family Share Plan
If you have at least two phones on it?
If you are not on this plat but would be ready and wliling to do it this month:
GO FOR IT BEFORE OCTOBER 31, 2014~~~~~
http://bgr.com/2014/09/27/att-data-plans-pricing-promotion/
Beginning Sunday, September 28th, and running through October 31st, Mobile Share Value plans with between 15GB and 50GB of data per month will see those data buckets double in size. This means that subscribers with accounts with two or more lines will have twice as much data each month without subscribers having to pay an additional penny.
This is how the promotional data plans break down:
This is a promo that families and big data users will undoubtedly appreciate, and it is available to new and existing AT&T subscribers alike. Of course, if you’re a current customer with a plan listed above and you want to see your data doubled, you’ll need to contact AT&T customer service or go to an AT&T store to switch to the new promotional plan.