AT&T Results Presentation Deck

2Q23 Mobility Results Revenues EBITDA 1 EBITDA Margin †1 $ amounts in billions Mobility $19.9 $8.1 40.5% 2Q22 789 $20.3 813 $8.7 43.0% Postpaid Phones 2Q23 326 0.69% 0.75% 0.79% 2Q21 2Q22 2Q23 Net additions (in thousands) Churn Strong revenue and EBITDA+¹ growth from high-quality subscriber and ARPU gains Wireless service revenues grew $741M, up 4.9% EBITDA¹ of $8.7B, up 8.3% Postpaid phone ARPU of $55.63, up 1.5% Continued strong EBITDA and service margins from sustainable go-to-market strategy and cost transformation ● ● ● Consistent and disciplined execution as industry growth normalizes 326K postpaid phone net additions ● Continued low postpaid phone churn of 0.79%, as improved value proposition continues to resonate with customers © 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. 8 t See notes slide 12 AT&T

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