AT&T's latest gigabit fiber deployment map. (credit: AT&T)

AT&T today launched its gigabit fiber Internet service in parts of Los Angeles and West Palm Beach and announced another 36 metro areas that will get the service at later dates.

AT&T's "GigaPower" service is available in 20 metro areas as of now, the company said in its announcement today. It launched first in Austin, Texas, in 2013.

Much of AT&T's 22-state telephone service footprint will remain stuck with slow DSL service, but AT&T agreed to deploy fiber to at least 12.5 million customer locations within four years in exchange for government approval to buy DirecTV. Including previous deployments, AT&T will end up building to more than 14 million homes and small businesses. This will make it one of the largest fiber deployments in the country, though still short of the roughly 20 million locations passed by Verizon FiOS.

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