AT&T actually has several varieties of 5G service available, including the low-band 5G service and the mmWave 5G+. There’s also 5GE, which is actually just a name for upgraded LTE.
But it’s likely true low-band 5G that you’re interested in. Currently, AT&T offers low-band 5G to a total of 58 markets, including major ones like Los Angeles, New York City and Boston. You’ll also find smaller locales on the list, such as Modesto, California and Worth, Georgia. We recommend giving the full list a look over if you’re curious.
AT&T’s much speedier 5G+ is available in 35 markets, such as Los Angeles and Nashville, but you may have a harder time actually using it.