AT&T Results Presentation Deck

7 3Q23 Mobility Results Revenues EBITDA 1 EBITDA Margin †1 $ amounts in billions $20.3 Mobility $8.3 40.8% 3Q22 928 0.72% 3Q23 Postpaid Phones $20.7 708 $8.9 43.0% 468 0.84% 0.79% 3Q21 3Q22 3Q23 Net additions (in thousands) Churn Strong revenue and EBITDA1 growth from high-quality subscriber and ARPU gains Wireless service revenues grew $571M, up 3.7% Postpaid phone ARPU of $55.99, up 0.6% EBITDA¹ of $8.9B, up 7.6% ● ● ● ● Consistent and disciplined execution with profitable customer growth • 468,000 postpaid phone net additions Continued low postpaid phone churn of 0.79%, as value proposition continues to resonate Focus on high value customers with deliberate segmentation ● Continued strong EBITDA and margin expansion from sustainable go-to-market strategy and cost transformation ● © 2023 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 10 AT&T

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