AT&T does a lot more than just cell phones. Probably also the largest US ISP behind Comcast, I'd expect. I had AT&T fiber to the home at a previous residence, a

AT&T does a lot more than just cell phones. Probably also the largest US ISP behind Comcast, I'd expect. I had AT&T fiber to the home at a previous residence, and that was a great product. Far superior to Comcast.