AT&T has the fastest 5G speeds in the U.S., based on data from Ookla. The Speedtest app collects real-world data from users, which is how it determines these speeds. AT&T currently uses a combination of sub-6GHz, millimeter-wave, and Dynamic Spectrum Sharing technologies for its 5G. AT&T is proudly announcing today that it has the fastest 5G network in the United States, based on data collected from Ookla Speedtest Market Analysis as of Q4 2020. This makes two consecutive years that the company has been crowned the fastest network — last year for 4G, this year for 5G — beating out both T-Mobile and Verizon who each hold a larger number of subscribers. AT&T's EVP of Technology Operations, Chris Sambar, maintains that its team worked tirelessly, and safely, through the pandemic to ensure that the company could continue to improve its network: