AT&T Investor Day Presentation Deck

14 5G FAST. RELIABLE. SECURE. UNLIMITED YOUR WAYSM FIRSTNET. Built with AT&T HBOMAX Wireless: Growing subscribers and EBITDA Churn Share of Net Adds FirstNet in AT&T Retail to verified responders 1Q18 1st 5G connection New Unlimited Plans launched 1. Represents AT&T postpaid voice share; Source: Externally reported financial statements AT&T Investor & Analyst Day / March 12, 2021 / 2021 AT&T Intellectual Property - AT&T Proprietary COVID-19 Impact Unlimited Your Way Nationwide 5G Launched HBO Max 33.5% 0.76% 4Q20 "Best Deals for Everyone" AT&T share¹ AT&T

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