AT&T Results Presentation Deck

9 4Q23 Consumer and Business Wireline Results Revenues EBITDA +3 EBITDA Margin +3 $ amounts in billions Consumer Wireline $3.2 $3.4 $1.0 31.2% 4Q22 Business Wireline $5.6 $1.9 $1.1 O 33.1% 4Q23 33.7% 4Q22 $5.1 $1.5 30.4% 4Q23 Revenue and EBITDA+3 growth driven by Fiber adoption, with Fiber revenues up ~22% Broadband revenues grew 8.3%, driven by Fiber subscriber and ARPU growth from mix shift to Fiber Fiber ARPU of $68.50, up 5.7%, with intake ARPU of $70+ AT&T Fiber net additions of 273K, reflecting resilient demand, seasonality and product superiority; added 1.1M AT&T Fiber subscribers in 2023 AT&T Internet Air now available in 35 locations; added 67K subscribers in 4Q23 ● ● Business Wireline results impacted by ongoing transition toward core connectivity • Year-over-year EBITDA*3 comparisons impacted by about $100M, which include discrete IP sales in 4Q22 not repeated in 4Q23 • Continued connectivity growth through 5G and fiber expansion enables share gains in small/medium businesses Business Solutions t6 wireless service revenues grew 5.9%; FirstNet added ~260K connections ● Ⓒ2024 AT&T Intellectual Property. AT&T and globe logo are registered trademarks and service marks of AT&T Intellectual Property and/or AT&T affiliated companies. t See notes slide 12 AT&T

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