One of AT&T's strongest coverage regions is in Houston. Its DSL service has nearly 100% availability in the city, and its fiber-optic service even has about 40% availability in Houston. Both connection types offer impressive speeds, but DSL will work best for smaller households and mild internet activity. Be aware, though, for some addresses, you can't get more than 25 Mbps on a DSL plan — not really enough if you like to stream 4K video, stream on multiple screens, or transfer large files. AT&T's fiber-optic service, on the other hand, can offer up to 1,000 Mbps of internet speed — fast enough to support a house full of smart tech, streamers, and online gaming. AT&T plans come with a generous data cap too: 1TB (1,000 GB), which is a lot of data — enough to stream 6 hours of 4K video every day. AT&T also has a stellar reputation for customer service, often winning awards from J.D. Power and topping the American Customer Satisfaction Index rankings. New customers may also receive promotions like free Wi-Fi equipment and no installation fees.