AT&T 5G Goes Live in Cities Such as Los Angeles, San Francisco

Photographer: Christopher Dilts/Bloomberg
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AT&T Inc. has switched on its 5G service in 10 markets, including the biggest cities in California, as it jockeys with Verizon Communications Inc. and T-Mobile US Inc. to build a next-generation network.

Millions of customers in places such as Los Angeles, San Diego and Pittsburgh can now access the service, AT&T said in a statement Friday. But users will have to upgrade to the Samsung Galaxy Note10+ to take advantage of the new network. AT&T is selling the phone for as little as $350 to consumers who meet certain qualifications and trade in an old device.