AT&T Results Presentation Deck

4Q20 - Subscriber Momentum Continues 6 Postpaid Phone Subscribers millions 63.0 63.1 62.9 63.5 1.07% Broadband Connectivity millions 3.9 4Q19 1Q20 2Q20 3Q20 4Q20 Postpaid phone subscribers Postpaid phone churn 28% Fiber Subscribers 4.1 4.3 64.2 4.7 0.76% 5.0 34% 4Q19 1Q20 2Q20 3Q20 4Q20 Fiber subscribers Penetration Net Adds 229K 800K 4Q19 4Q20 Net Adds 191K 273K 4Q19 4Q20 © 2021 AT&T Intellectual Property. Software-Based Entertainment HBO Max and HBO Subscribers millions 34.6 33.1 36.3 38.0 (946) 4Q19 1Q20 2Q20 3Q20 4Q20 41.5 Total U.S. HBO Max and HBO Subscribers Premium TV Losses thousands 4Q19 1Q20 2Q20 3Q20 4Q20 (897) (887) (591) (617)

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