Disclosure# Disclosure Topic 2021 Response 403-3 Occupational health services The EHS team partners with line of business leadership to manage EHS risk across the enterprise and to ensure implementation of applicable EHS Enterprise Programs. This includes program development, change management, regulatory updates, site assessments, training, incident investigation, metric development and reporting, and interfacing with regulators. The EHS team identifies gaps and implements programs needed to ensure ongoing compliance and continuous improvement of the EHS Management System. The EHS team works with Safety Lead Employees, who are responsible for the implementation and management of EHS Enterprise Programs that apply to their lines of business, and Site Leads, who manage EHS processes and procedures at their sites, implement EHS Enterprise Programs, communicate EHS program information, and review EHS issues with the local Safety Committee. Supervisors are responsible for EHS program adherence for their area of authority. T-Mobile maintains a centralized electronic repository for company-wide access to EHS program documents. 403-4 Worker participation, consultation, and communication on occupational health and safety T-Mobile maintains a centralized electronic repository for company-wide access to EHS program documents. All T-Mobile employees receive Company Safety Training and Enterprise Emergency Procedures. In addition, T-Mobile requires training and instruction on general and job-specific EHS practices as appropriate. In addition, safety committees are formed for any non-retail facility with more than ten employees in order to provide a forum to regularly discuss and address local workplace hazards, reduce workplace EHS risks, and promote health and safety awareness. For facilities with ten or fewer employees, the senior manager at the facility includes EHS issues as a recurring topic during staff meetings. 403-5 Worker training on occupational health and safety All T-Mobile employees receive Company Safety Training and Enterprise Emergency Procedures. In addition, T-Mobile requires training and instruction on general and job-specific EHS practices as appropriate, which includes: ■ New job assignment EHS training; ■ EHS training for whenever new substances, processes, procedures, or equipment are introduced to the workplace and present a new hazard; ■ EHS training for whenever the facility is made aware of a new or previously unrecognized hazard; ■ Manager-led instruction for employees under their direction that includes the safety and health hazards to which they may be exposed; ■ First aid, cardiopulmonary resuscitation (CPR), and bloodborne pathogen certification training for all telecommunications field workers; and ■ Other training as required to ensure the health and welfare of employees (e.g., ladder training, fire extinguisher, etc.). 403-6 Promotion of worker health 2021 Corporate Responsibility Report: Our People > Health, Safety, and Wellness Read about our benefits on our website: Employee Benefits 403-7 Prevention and mitigation of occupational health and safety impacts directly linked by business relationships 2021 CORPORATE OUR OUR OUR RESPONSIBILITY REPORT GOVERNANCE PEOPLE COMMUNITIES GRI Index Continued T-Mobile has a well-defined Contractor Safety Program, which works to ensure more than 1,000 key vendors have the proper health and safety programs in place to prevent workplace incidents while doing work on behalf of T-Mobile. All such programs must be uploaded into a third-party database, and key safety metrics from the past three years are entered, and then reviewed by the EHS team. If vendors do not meet T-Mobile’s criteria, they are not authorized to do work on T-Mobile’s behalf. 84 OUR COMPANY THE ENVIRONMENT THE NUMBERS AND SMALL PRINT