Disclosure# Disclosure Topic 2021 Response 103-3 Evaluation of the management approach 2021 Corporate Responsibility Report: Our Company > ESG Approach 303-1 Interactions with water as a shared resource (management approach disclosures) T-Mobile employee occupied buildings across the United States, interacting with domestic water use (includes data centers, call centers, offices, stores, switches, warehouses), and some cell sites with irrigation through our direct operations. Water withdrawal and discharge occurs through the different municipal systems in the United States. As outlined by our Responsible Sourcing Guidelines , we show a preference for working with suppliers who demonstrate adherence to industry best practices in areas such as water use. 303-2 Management of water discharge-related impacts (management approach disclosures) We manage our domestic wastewater released through the sewage system of our buildings according to each municipal water treatment system standard. We therefore follow all local municipal wastewater treatment protocols for domestic water discharge from our facilities. 303-5 Water consumption In 2021, T-Mobile used 1,054,583 cubic meters (m 3 ) of water. This includes the municipal water withdrawal that we are directly billed for in our buildings (data centers, customer experience centers, offices, retail stores, switches, warehouse), and some cell sites with irrigation. Material Topic: Greenhouse Gas Emissions and Climate Change GRI 305: Emissions 103-1 Explanation of the material topic and its Boundaries 2021 Corporate Responsibility Report: Our Company > ESG Approach 2021 Corporate Responsibility Report: The Numbers and Small Print > Material Topic Definitions 103-2 The management approach and its components Environmental Policy CDP Climate Change Response 2021 Corporate Responsibility Report: The Environment > Climate Change 103-3 Evaluation of the management approach 2021 Corporate Responsibility Report: Our Company > ESG Approach GRI Index Continued 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR GOVERNANCE OUR COMMUNITIES THE ENVIRONMENT THE NUMBERS AND SMALL PRINT 77 OUR COMPANY