AT&T's initial offer of free HBO access to wireless subscribers was tempting, but there was a catch: you had to spring for an Unlimited Plus plan, which at $90 or more per month isn't a trivial expense. Now, however, you don't have to be such a big spender. The carrier is extending bonus HBO access to Unlimited Choice customers on September 15th, giving you the same streaming TV if you pay as little as $60 per month for cellphone service. This is one of the few perks of giant mergers, it seems. There are some catches to getting a freebie like this on a low-cost tier, of courser. The Choice plan caps your cellular data at 3Mbps and limits you to a maximum resolution of 480p for video streaming, so you might want to stay on WiFi for that Game of Thrones re-watch.