T-Mobile Investor Day Presentation Deck

Happy Customers 68% improvement in Net Promoter Score since 2016 LEVERAGING TEAM OF EXPERTS TO SUPERCHARGE THE CUSTOMER EXPERIENCE Staying Longer 50 bps improvement in postpaid phone churn from 2015 to 2019 Deepening Relationships Initial measures to improve the Sprint customer experience has increased Sprint's NPS by 50% after interactions with Experts Activations through Care up 4X since launching Team of Experts Building on the Successes of TEX for Sprint Bringing full TEX experience to Sprint customers, with tools like Expert Assist and Next Best Action for our frontline heroes, already underway Less Effort 50% reduction in calls per account 48

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