AT&T Investor Day Presentation Deck

Complemented by strong spectrum position 173Mhz Mid-Band Low Mid C-band High mmWave AT&T Spectrum Holdings (MHz) 22 38 7 20 80 15 1040 23 20 72 20 93 700 700DE FN 800/850 PCS AWS1 AWS3 WCS C-band 1. GWS awarded AT&T Best Network OneScore 2020. GWS conducts drive tests for AT&T and uses the data in its OneScore analysis; 2. Based on overall coverage in U.S. licensed/roaming areas 13 AT&T Investor & Analyst Day / March 12, 2021 / 2021 AT&T Intellectual Property - AT&T Proprietary America's Best Network¹ Nation's Largest Network² Nationwide 5G FirstNet AT&T

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