Topic SASB Code Requested Metric 2021 Response Number of Wireless Subscribers TC-TL-000.A Quantitative T-Mobile reported 108,719,000 wireless customers at the end of 2021. A customer is generally defined as a SIM number with a unique T-Mobile identifier which is associated with an account that generates revenue. Customers are qualified either for postpaid service utilizing phones, High Speed Internet, wearables, DIGITS, or other connected devices, which include tablets and SyncUP products, where they generally pay after receiving service, or prepaid service, where they generally pay in advance of receiving service. Our postpaid customers include customers of T-Mobile. Our prepaid customers include customers of T-Mobile and Metro by T-Mobile. Number of Wireline Subscribers TC-TL-000.B Quantitative T-Mobile does not have customers who contract with us for fixed line phone services as outlined by the standard. Number of Broadband Subscribers TC-TL-000.C Quantitative T-Mobile reported 646,000 High Speed Internet customers at the end of 2021. Network Traffic TC-TL-000.D Quantitative T-Mobile does not currently report this information. SASB Index Continued 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR GOVERNANCE OUR COMMUNITIES 92 OUR COMPANY THE ENVIRONMENT THE NUMBERS AND SMALL PRINT