February 2017 New Unlimited Data
AT&T Wireless has introduced a brand new unlimited wireless data offer for its new and existing customers starting 2/17/2017. Clearly AT&T's goal is to meet the competition. This does not require DirecTV.
On 2/27/2017 they lowered the price from $100 to $90 when you get paperless billing and make automatic payments from a bank account. (Not credit card) You will get 10GB of high-speed tethering each month.
AT&T also created an "Unlimited Choice" plan that costs $60 a month and has no data caps and overage fees. This plan does not include any tethering, and video is always reduced to about 480p resolution or a maximum bandwidth of 1.5Mbps.