The newest group includes New York City, Detroit, Philadelphia, Baltimore,, Washington DC, Las Vegas, Louisville and Buffalo as well as Bridgeport, Connecticut. Maps for the new cities, as well as Boston, which isn't live yet, can be found on AT&T's website.
The low-band flavor of 5G, which uses AT&T's 850MHz spectrum, covers larger areas than the higher-frequency millimeter-wave 5G AT&T has been deploying around the country since last year. Unlike millimeter-wave 5G, however, the low-band version doesn't bring tremendous speed improvements, with AT&T 4G LTE network, which it hasthat the low-band network will initially be similar to the company's latest
The carrier currently sells one 5G phone to consumers, Samsung's $1,300 Galaxy Note 10 Plus 5G, though it will only work with the low-band 5G and requires you to have one of AT&T's recent Unlimited Extra or Elite data plans.
Devices that work with both low-band and millimeter-wave 5G are expected to arrive in 2020.
As for millimeter-wave, AT&T has also been expanding that footprint and recently added parts of Baltimore; Detroit; King of Prussia, Pennsylvania; and West Hollywood, California. That brings its total count of areas with millimeter-wave (what it calls "5G Plus") to 25 cities.