Responsible Supply Chain Optimizing Supply Chains for People and the Planet The success of our business depends on the strong relationships we build with our wide and diverse network of global suppliers. We develop long-lasting, trusting, and mutually beneficial relationships with suppliers that share our strong values and operate in a responsible and sustainable way. T-Mobile suppliers are expected to share our commitment to doing things the right way while conducting business either with or on behalf of T-Mobile. Governing Our Supply Chain in the Right Way Our Supplier Code of Conduct governs our supply chain and sets out expectations for supplier conduct in areas ranging from customer care and integrity to reducing greenhouse gas (GHG) emissions and water use, responsibly sourcing materials, and protecting human rights. We expect suppliers to promptly report concerns about violations of the Code to the T-Mobile Integrity Line . We also provide detailed Responsible Sourcing Guidelines which recognize the human rights and environmental risks associated with extracting, transporting, and trading certain natural resources such as conflict minerals and paper fiber. For more information, see the Natural Resources Management section. Our Human Rights Statement and Environmental Policy also apply to our suppliers. While our suppliers have the responsibility to undertake their own work to address human rights and environmental issues, we are committed to supporting their efforts. Monitoring Risks with Third-Party Risk Management Even before suppliers are selected, a centralized Third-Party Risk Management (TPRM) process screens for anti-corruption, global sanctions and human rights violations, and financial, security, reputational, and environmental risks. Supplier risk assessments are performed on an ongoing basis depending on the risk profile of the supplier, with the goal of ensuring we are not conducting business with any supplier that could pose a risk to our operations or reputation. Our TPRM process also continually monitors current suppliers for policy violations and risks through automated, real-time workflows that look for any adverse news or changes in supplier risk profiles. Additionally, Supplier Code of Conduct compliance is affirmed through standard supplier contract terms, TPRM assessment questionnaires, and Procurement’s vendor onboarding forms. Events or issues detected by TPRM monitoring are escalated to the enterprise Legal, Compliance, and business teams for review and recommended handling. Science-Based Targets for Suppliers Setting science-based emissions reduction targets has helped us dramatically reduce our GHG emissions. That’s why we encourage our suppliers to set their own science-based reduction targets by working with the Science Based Targets initiative (SBTi), and to bring them in line with the world’s ambition to limit global warming to 1.5°C. The more companies we can influence toward setting and achieving science-based targets, the bigger emissions reductions we can achieve together, and the better off our planet will be. INCREASED VISIBILITY INTO SUPPLY CHAIN SUSTAINABILITY EcoVadis is a leading provider of business sustainability ratings, helping businesses to better evaluate the environmental, social, and ethical performance of their own operations and those in their supply chain. In 2020, we  began using their supplier assessment to better evaluate our supply chain across four key areas: environment, labor and human rights, ethics, and sustainable procurement. Each supplier who participates is evaluated with a rigorous evidence- based scorecard that identifies strengths and areas of opportunity. This gives us a chance to better engage with our suppliers on key issues in the four categories and drive improvements that benefit us all. In 2021, we strengthened our practices around supplier scoring and officially integrated the EcoVadis evaluation into our TPRM process. Going forward, we are continuing to increase the number of suppliers assessed. 38% of sourceable spend assessed by EcoVadis in 2021 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR COMMUNITIES THE NUMBERS AND SMALL PRINT 23 OUR COMPANY THE ENVIRONMENT OUR GOVERNANCE