https://consumerist.com/2017/09/12/att-expands-free-hbo-offer-to-include-all-unlimited-wireless-plans/

Five months after announcing that customers on its Unlimited Plus plan would get complimentary HBO access, AT&T says members of its cheaper Unlimited Choice wireless option will also be able to stream as much Game of Thrones as they want for free.

All current and new AT&T Unlimited Choice customers will have free HBO starting Sept. 15, AT&T announced today.