GRI Index Continued Disclosure# Disclosure Topic 2021 Response Stakeholder Engagement 102-40 List of stakeholder groups 2021 Corporate Responsibility Report: Our Company > ESG Approach 102-41 Collective bargaining agreements T-Mobile is committed to recognizing employees’ rights to organize, and to refrain from organizing. We abide by both the letter and the spirit of the U.S. National Labor Relations Act (NLRA), under which employees have the right to decide whether to support or not support a union. We train our supervisors on the NLRA, which stipulates the legal requirements concerning union rights. 102-42 Identifying and selecting stakeholders 2021 Corporate Responsibility Report: Our Company > ESG Approach 102-43 Approach to stakeholder engagement 2021 Corporate Responsibility Report: Our Company > ESG Approach 102-44 Key topics and concerns raised 2021 Corporate Responsibility Report: Our Company > ESG Approach Reporting Practices 102-45 Entities included in the consolidated financial statements T-Mobile 2021 Form 10-K Part I pages 4, 28 102-46 Defining report content and topic boundaries 2021 Corporate Responsibility Report: About This Report 2021 Corporate Responsibility Report: Our Company > ESG Approach 102-47 List of material topics 2021 Corporate Responsibility Report: Our Company > ESG Approach 102-48 Restatements of information None 102-49 Changes in reporting None 102-50 Reporting period January 1, 2021 to December 31, 2021 unless otherwise stated 102-51 Date of most recent report 2021 102-52 Reporting cycle Annual 102-53 Contact point for questions regarding the report [email protected] 2021 CORPORATE RESPONSIBILITY REPORT OUR PEOPLE OUR GOVERNANCE OUR COMMUNITIES THE ENVIRONMENT THE NUMBERS AND SMALL PRINT 73 OUR COMPANY