AT&T Results Presentation Deck

3Q21 Communications Segment $ in billions Revenues 7 EBITDA †2 EBITDA Margin t2 Mobility $17.9 $7.7 43.1% $2.5 39.9% 3Q20 $19.1 3Q20 3Q21 Business Wireline $6.3 $5.9 $8.0 $0.9 30.4% 3Q20 41.7% $2.3 38.5% 3Q21 Consumer Wireline $3.0 $3.1 $1.0 30.5% 3Q21 Strong revenue, EBITDA and subscriber gains Revenues up 7.0%; service revenues up 4.6% Strong EBITDA and service margins 928,000 postpaid phone net adds; 249,000 prepaid phone net adds Margins remain strong with a refined portfolio Revenue comps impacted by pandemic demand in 3Q20 and proactive portfolio rationalization Emphasizing core network and transport connectivity Broadband drives revenue and EBITDA growth Solid AT&T Fiber gains with sequential net add growth EBITDA and revenue growth as Fiber strength offsets legacy declines October 21, 2021 / 2021 AT&T Intellectual Property - AT&T Proprietary + See notes slide 10 AT&T

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