Responsible Supply Chain Continued Training the NextTech Generation A team of inner-city youth are climbing a cellular mast for the first time in helmets and safety gear. This isn’t a real mast. It’s a training structure for future technicians. Once their training is done, many of them will be up in the sky for real and on a new career track as part of the skilled workforce making the 5G revolution possible. The training exercise is part of the NextTech Diversity Program, which is designed to connect women and men of color with the skills, training, and opportunities to become network technicians. For many, it’s a life-changing experience. Not a lot of people look like me in the industry,” says Mike Penn, who graduated from the program to become a certified 5G tower technician. “The NextTech industry is paving the way. I love my job and I can definitely see myself doing this for a long time.” 100% of the 2021 program graduates have been placed in full-time employment Equipping People of Color for Opportunities in 5G Transporting and building 5G infrastructure across all wireless providers will require an estimated 20,000 field technicians and trained tower crew workers . But people of color comprise a disproportionately small percentage of workers in the field. T-Mobile established the NextTech Diversity Program to change that—connecting an industry need for skilled workers with a group that’s underrepresented in this part of the workforce. iii As part of our Equity In Action efforts, the program began in January 2021 with seed funding to train and graduate everyone who participates. The program also guarantees job placements for those who graduate with a technician’s certificate or commercial driving license. A Successful Year One The program celebrated its first anniversary in February 2022, boasting a 100% graduation and career placement rate for the 70 participants in the inaugural network technician and equipment driver classes. “I am so proud to be managing an exciting T-Mobile program aimed at supporting women and men of color within underrepresented communities,” says Joyce Christanio, senior program manager of NextTech for T-Mobile. “I can personally identify with and whole- heartedly embrace this program because, as a youth, I too lived in an underrepresented community. Being privy to unfortunate situations occurring in inner-city communities, such as drug deals, neighbors with addictions, robberies, and losing a brother to senseless gun violence, I understand the importance of lending a hand to others to improve their lifestyles. While not everyone can’t afford a college education, this program provides individuals a hand to exceed a minimum wage salary, resulting in sustainable careers.” The NextTech Diversity Program started with an initial cohort to train future network technicians through the Learning Alliance Corporation, and added the Equipment Driver Program in the fall of 2021 through the New Reflections Technical Institute. Plans to expand don’t stop there. In 2022, T-Mobile doubled the NextTech Diversity’s Technician Program class from 50 students in 2021 to 100 students in 2022 and grew the Equipment Driver Program from 20 students to 50. iii T-Mobile.com, Investing in communities and people to build wireless networks . 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR COMMUNITIES THE NUMBERS AND SMALL PRINT 25 OUR COMPANY THE ENVIRONMENT OUR GOVERNANCE

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