Disclosure# Disclosure Topic 2021 Response 306-2 Management of significant waste- related impacts Universal Regulated Waste: T-Mobile works with a single national vendor to provide universal regulated waste collection across the company. This includes collection for dry cell batteries, bulbs, ballasts, aerosol cans, and some small electronics. All corporate owned retail stores have regulated waste collection centers on site to ensure accessible collection. Employees and contractors at other locations can also request vendor universal regulated waste collection supplies from a T-Mobile internal web portal. Document Shredding: T-Mobile provides secure document shredding at retail and commercial real estate offices. For employees at our Overland Park, Kansas office, shred paper collection events are held monthly at no charge to employees. E-waste: T-Mobile works to responsibly manage electronic waste across our operations, which includes IT and network equipment. We also provide opportunities for customers to responsibly dispose of their devices. Our device recycling and reuse program aims to recover devices, such as phones, smartwatches, tablets, hotspots, and IoT items. Municipal Solid Waste: Trash and recycling services are provided at our buildings according to local regulations and guidelines outlined by building owners. Hazardous waste: T-Mobile works with select vendors to responsibly manage hazardous waste and dispose of it in accordance with applicable laws and regulations. Third-party waste management and oversight processes: T-Mobile works with a third-party waste diversion consultant to optimize recycling best practices. In addition, the third-party waste diversion consultant audits service provided by our two national haulers to right-size those services and validate they match the contracted agreement. We are also a member of the Department of Energy’s Better Buildings Waste Pilot in an effort to share and learn best practices for waste diversion, reporting, and employee engagement and education. Processes used to collect and monitor waste-related data: We receive waste reports from select vendors, including national haulers and recyclers for select waste streams. 306-3 Waste generated Total Waste: 40,606.18 metric tons (MT) ■ Municipal Solid Waste: 12,533.31 ■ Hazardous and Non-hazardous Waste: 17.34 ■ Compost: 0.90 ■ Mixed Recyclables and Regulated Waste: 8,323.01 ■ Paper Shred: 2,923.32 ■ IT Equipment: 567.04 ■ Network Equipment: 16,236.90 ■ Handsets and Tablets (excludes customer devices): 4.36 306-4 Waste diverted from disposal T-Mobile generated approximately 28,055 metric tons of waste that was diverted from disposal. 306-5 Waste directed to disposal T-Mobile generated approximately 12,550 metric tons of non-diverted waste, largely consisting of municipal solid waste and a limited amount (approximately 0.1%) of non-hazardous and hazardous waste responsibly managed by approved vendors in accordance with applicable laws and regulations. 82 GRI Index Continued 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR GOVERNANCE OUR COMMUNITIES OUR COMPANY THE ENVIRONMENT THE NUMBERS AND SMALL PRINT