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Sinch Results Presentation Deck

Opex development 800 600 400 200 0 418 418 Q4 as reported 2020 524 Adjusted Opex Gross profit - Adjusted EBITDA 524 Q4 with 3 months of SDI Adjusted Opex, SEKm 551 532 Q1 586 547 Q2 2021 Sinch & SDI Other acquisitions 597 556 Q3 877 228 649 Q4 Includes 37m bad debt • Slower opex growth in 2020 due to Covid-19 outbreak • Increased opex base during 2021 - Sales & product initiatives - Preparations for upcoming, large acquisitions ● - Businesses acquired during 2022 adding further Opex SEK 37m one-time impact on Opex in Q4 21 due to bad debt from a specific voice customer 17% underlying opex growth in Sinch+SDI excluding one-off 6

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