T-Mobile Investor Day Presentation Deck

C-Band 2.5 GHz I I I I I SMART C-BAND INVESTMENT 2.5 GHz vs. C-Band holded ㅠㅠ 65% 100%- C-Band is best suited to dense urban deployments due to limited propagation Extensive site densification required to match 2.5 GHz coverage in suburban and rural geographies Focused deployment of C-band where needed in urban areas complements 2.5 GHz base layer resulting in massive capacity at lower cost T-Mobile deployment provides significant advantage to customer experience providing unrestricted access to 5G Extensive capacity opens growth in new areas like home broadband Requires 1.5x more sites than 2.5 GHz, and 2x more sites than AWS/PCS "A" Xº 90 A 2⁰ 2.5 GHz Coverage Footprint ** T T Fr M ** C-Band Coverage Footprint 31

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