Disclosure# Disclosure Topic 2021 Response 103-3 Evaluation of the management approach 2021 Corporate Responsibility Report: Our Company > ESG Approach 302-1 Energy consumption within the organization Total fuel consumption within the organization from non-renewable sources: 800,348 GJ ■ Fleet diesel: 4,309 GJ ■ Fleet gasoline: 422,431 GJ ■ Jet fuel: 16,572 GJ ■ Stationary diesel: 147,791 GJ ■ Propane: 20,996 GJ ■ Natural gas: 188,249 GJ Total fuel consumption within the organization from renewable sources: 0 GJ In joules, watt-hours or multiples, the total: ■ Electricity consumption: 7,806,077 MWh ■ Heating consumption: 0 MWh ■ Cooling consumption: 0 MWh ■ Steam consumption: 0 MWh In joules, watt-hours or multiples, the total: 0 MWh ■ Electricity sold: 0 MWh ■ Heating sold: 0 MWh ■ Cooling sold: 0 MWh ■ Steam sold: 0 MWh Total energy consumption within the organization, in joules or multiples: 28,902,225 GJ: ■ Fleet diesel: 4,309 GJ ■ Fleet gasoline: 422,431 GJ ■ Jet fuel: 16,572 GJ ■ Stationary diesel: 147,791 GJ ■ Propane: 20,996 GJ ■ Natural gas: 188,249 GJ ■ Electricity: 28,101,877 GJ Standards, methodologies, assumptions, and/or calculation tools used: Energy consumption data is collected, calculated, and reported in accordance with the GHG Protocol and T-Mobile’s standard procedures and guidelines for sustainability reporting. All energy consumption data is verified annually by an independent third party to the International Standard on Assurance Engagements (ISAE) 3000 (Revised) standard. All energy consumption that is designated to be within T-Mobile’s operational control is included. Most data is historical in nature and based on primary data. Estimation methodologies are used for a small number of sites where primary data is not available. Source of the conversion factors used: Publicly available conversion factors from the U.S. Environmental Protection Agency (EPA) and the International Panel on Climate Change (IPCC) are used to convert from the native unit of measure (gallons or mmBTU) to MWh. Standard and recognizable conversion factors are used to convert from MWh to GJ (x * 3.600). Conversions: ■ U.S. EPA Center for Corporate Climate Leadership: “Emission Factors for Greenhouse Gas Inventories”, (2020) ■ IPCC: “2006 IPCC Guidelines for National Greenhouse Gas Inventories”, (2006) For more information, refer to our latest CDP Climate Change response and our third-party Assurance Statement on our reporting page . GRI Index Continued 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR GOVERNANCE OUR COMMUNITIES THE ENVIRONMENT THE NUMBERS AND SMALL PRINT 75 OUR COMPANY