Business Continuity Being Prepared and Building Resiliency Business disruptions come in all shapes and sizes—from natural disasters and pandemics to staffing issues and equipment or application failures. When a disruption does occur, preparedness planning can make all the difference. Our Enterprise Continuity Program considers the full range of natural and man-made events that could impact our customers, employees, operations, and assets across the country and develops risk mitigation and business continuity strategies to keep our teams prepared and our customers connected. Planning with an “All Hazards” Mindset At T-Mobile, we develop business continuity and emergency preparedness plans with an “all hazards” mindset, meaning we have plans in place for a wide range of business disruptions and proactively find ways to eliminate any single points of failure. Our enterprise continuity team works with every team in the company to conduct annual reviews and update our Business Continuity Plans, ensuring they are current, comprehensive, and effective so the company is ready to coordinate and respond to any new event. The enterprise continuity team utilizes tools such as a Business Impact Analysis to examine each part of our business and network to determine the impact and severity of different disruptions on our customers, employees, and infrastructure. This helps us prioritize recovery tasks and identify interdependencies, ensuring that our contingency plans are resilient and all-encompassing. We know how much our customers rely on their connectivity and we invest heavily in the resiliency of our network through network design and operational redundancies that significantly reduce the chance of network failure. As a result of a multi-year network hardening investment we added thousands of backup generators and advanced relief and recovery tools to better equip network switches, data centers, and other critical sites in hurricane-prone areas. Climate Risk and Oversight As the frequency and severity of extreme weather events increase, evaluating climate-related risks and preparing for natural disasters and regional power outages has become increasingly critical to our business. T-Mobile’s President of Technology oversees the company’s network resilience strategy, which includes evaluating technology disruptions and climate-related impacts to develop and continually update risk mitigation plans. Our Enterprise Risk Management team also partners with groups across the company to track progress on network resiliency, such as the effectiveness of power backup systems in data centers and the network hardening efforts in at-risk areas. As part of the risk assessment process, our network sites are evaluated for vulnerabilities to environmental change. To help ensure business-critical risks are overseen and communicated at the Board level, the Senior Vice President of Internal Audit & Risk Management serves as the Chief Audit Executive and has a direct communication channel to the Audit Committee for purposes of reporting or discussing concerns. The Chief Audit Executive receives quarterly status reports on the Enterprise Continuity Program and provides a quarterly enterprise-wide risk assessment report to the Audit Committee. Each year we evaluate our Enterprise Continuity Program and review our risk management procedures and evolve them as needed to help mitigate against evolving threats. Ready to Respond When an emergency does occur, we quickly implement our preparedness plans to keep our employees safe and customers connected. Our Enterprise Incident Management team manages a virtual Emergency Operations Center to oversee and coordinate the company’s response throughout the event. This enables us to work effectively with stakeholders inside and outside of our business, from emergency engineering and community support teams on the ground, to retail staff, local authorities, meteorologists, and political leaders. It’s this approach that enables us to move quickly. Beyond working to maintain connectivity and services, we’re also proud of the humanitarian assistance we provide to affected communities through our disaster relief efforts. For more information, see the Natural Disaster and Community Support section. 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR COMMUNITIES THE NUMBERS AND SMALL PRINT 19 OUR COMPANY THE ENVIRONMENT OUR GOVERNANCE