T Mobile US : 2023 CR Report

CONNECTIVITY WITH PURPOSE

FORWARD2023 Corporate Responsibility Report

2023 CORPORATE	OUR	OUR	OUR	OUR	OUR	THE NUMBERS
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WHAT'S INSIDE

OUR COMPANY	OUR COMMUNITIES
3	CEO Statement	37	2023 Communities Highlights
4	About T-Mobile	38	Community Engagement and Philanthropy
5	ESG Approach	39	Digital Equity
OUR GOVERNANCE	44	Supporting Smaller Markets and Rural Areas
45	Employee Giving Programs
10	2023 Governance Highlights	OUR PLANET
11	Corporate Governance and ESG Oversight
13	Ethical Business Practices	47	2023 Planet Highlights
15	Cybersecurity	48	Climate and Net-Zero
16	Data Protection and Privacy	50	Energy Use
17	Business Continuity and Network Resilience	54	Product Lifecycle Management
20	Responsible Supply Chain	56	Natural Resources and Waste
OUR PEOPLE	THE NUMBERS AND SMALL PRINT
24	2023 People Highlights	59	Reporting Information
25	Our Culture	60	Notes About This Report
26	Employee Attraction and Retention	61	ESG Data Tables
28	Diversity, Equity, and Inclusion	67	Material Topics Definitions
31	Learning and Career Development	69	GRI Content Index
33	Employee Health, Wellness, and Safety	87	SASB Content Index

34 Employee Benefits

Connect with T-Mobile

This report is prepared with reference to the Global Reporting Initiative (GRI) Standards, as well as Sustainability Accounting Standards

Board (SASB) Standards for our industry. It covers the domestic operations and activities of T-Mobile US, Inc. in the United States,

Puerto Rico, and the U.S. Virgin Islands for the calendar year 2023 (January 1 to December 31) unless otherwise noted.

Find out more in The Numbers and Small Printsection.

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2023 CORPORATE RESPONSIBILITY REPORT

CEO STATEMENT

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1. WORD FROM OUR CEO, MIKE

The remarkable growth T-Mobile experienced in 2023 was driven by our mission to be the best in the world at connecting customers to their world.

This mission stems from the understanding that our actions directly impact people's lives. As a leading wireless and broadband provider, we have the network, resources, and scale to make a real difference as a force for good. And the success we achieve in our business gives us the momentum to influence positive change for our customers, employees, communities, and the planet.

Our work to deliver reliable and accessible connectivity in our increasingly digital world is critical. We currently reach more than 330 million

The success we achieve in our business gives us the momentum to influence positive change for our customers, employees, communities, and the planet."

people, or 98% of the U.S. population, with T-Mobile's 5G network, yet a digital divide persists. Millions of people are being left behind - particularly school- aged children who don't have the resources they need to learn and thrive. Our flagship Project 10Million program is tackling this "homework gap," investing over $6.4 billion in products and services to date and connecting nearly 6 million student households with free or highly reduced connectivity. And that work continues as the need continues.

We were reminded once again of the crucial role connectivity plays in people's lives when disastrous wildfires struck Maui in August 2023. T-Mobile quickly showed up to the island with the services needed

to connect people with their loved ones, along with resources to help the community rebuild and recover. This was just one example of many throughout the year where our dedicated engineering and consumer teams responded to disasters across the country.

Our amazing employees are the heart of our efforts. They love our customers and constantly challenge us to dream big and deliver the best network, best value, and best experiences for them. As an extension of our community-building work, they actively give back to and support organizations that are meaningful to them. They are generous with their time, resources, and spirit.

This commitment to community extends beyond individual contributions. In 2023 alone, our company, Foundation and employees were proud to offer more than $1.5 billion in funding and in-kind products and services to support numerous initiatives, relief efforts, and volunteer and matching-gift programs.

We're also thankful for the contributions of many others who we consider partners in these efforts: our vendors, government officials, community organizations and, of course, our customers, to name a few. The theme of this report is "Forward Together" because we know that we cannot go about this work alone, but also because we can achieve so much more when we tackle these issues together.

We find purpose in working with our employees and partners to provide critical connectivity, but we're also glad to be doing it in a sustainable way. Thanks to renewable energy certificates, the T-Mobile network is powered by 100% renewable electricity, and serves as the cornerstone for our industry-leading environmental commitment to reach net-zero emissions for our entire carbon footprint by 2040. We were the first in U.S. wireless to set this ambitious goal and are making notable progress.

T-Mobile had an unforgettable 2023. Our relentless determination to do things the right way, connect people who need it most, and create opportunity fueled our success - and will continue to do so.

In this exciting era of the Un-carrier's journey, we will keep showing up for our customers, employees, communities, and the planet.

MIKE SIEVERT

CEO T-Mobile US, Inc. @MikeSievert

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ABOUT T-MOBILE

FORWARD TOGETHER

We're driving a new era of customer-focused innovation, connecting customers to their world with the largest, fastest1 5G network, and leading the way toward universal connectivity in our quest to deliver access for all.

OUR VISION:

#1 in customer choice and #1 in customer hearts.

We're building on our network lead with an increased focus on customer needs and innovation to continue delivering the best value on the best network with the best experiences.

We're leveraging our network, resources, and scale to be a force for good in our communities and our planet.

We're working to revolutionize how our business gets done - deepening our relationships with our customers and empowering our employees in whole new ways.

98%

of the U.S. population is covered by our 5G network - more than 330 million people across 2 million square miles.

OUR MISSION:

Be the best in the world at connecting customers to their world.

SERVICES	HQ LOCATIONS
We provide services,	Headquartered in Bellevue, WA
devices, and accessories	and Overland Park, KS.
across our flagship brand
T-Mobile and prepaid
brand Metro by T-Mobile.

View our Annual Report to learn more about our business strategy.

1 Fastest based on median, overall combined 5G speeds according to analysis by Ookla® of Speedtest Intelligence data 5G median download speeds for Q3 2023. Ookla trademarks used under license and reprinted with permission.

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ESG APPROACH

A MESSAGE FROM OUR CHIEF COMMUNICATIONS & CORPORATE RESPONSIBILITY OFFICER

Our strategic approach to corporate responsibility focuses on where we can drive the greatest impact and propel our business and communities forward."

As we continue into the next chapter of the Un-carrier, we remain committed to using our network, resources, and scale for good while building a more connected, equitable, and sustainable future for all.

We set a bold, industry-leadingnet-zero goal, connected hundreds of thousands more students

to the internet through Project 10Million, and invested in hundreds of communities across the country through non-profit partnerships, employee giving programs, and hiring initiatives. Our progress inspires us to

do more as we pursue our mission to be the best in the world at connecting customers to their world.

This means looking at how we can do better

and where we can dream bigger to have a positive impact on people and the planet together. That's why our strategic approach to corporate responsibility focuses on where we can drive the greatest impact and propel our business and communities forward through our operations, technology, and our people in the years to come.

Through our leading 5G network, we're championing more affordable and accessible connectivity to empower as many people as possible to succeed in today's digital world. We're breaking down barriers to career opportunities and investing in initiatives to develop a dynamic and diverse employee base who are equipped with the skills to continue innovating and delivering the best experiences for our customers. We also actively look at where sustainable solutions can bring wins for our business, our customers, and the planet through our products and services. We focus on doing the right things, the right way

to make an impact that makes a difference.

As we continue creating a connected world where everyone can thrive, our approach to corporate responsibility will grow and adapt in ways that match the evolution of our business and technologies, the needs of our customers and communities, and the expectations of stockholders and investors. Together, we can shape a new era of connectivity with purpose.

JANICE V. KAPNER Executive Vice President & Chief Communications & Corporate Responsibility Officer T-MobileUS, Inc.@JaniceKapner

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ESG APPROACH CONTINUED

OUR ESG

APPROACH

T-Mobile products and services play a central role

EVERYONE		DIGITAL		PRIORITIZING
IN		FOR ALL		OUR PLANET
Diversity, Equity, and Inclusion		Digital Equity		Environmental Sustainability

in people's lives, impacting how they work, learn, live, and engage with others and the world around them.

That's why we leverage our technology, scale, and resources to be a force for good in our industry and the world, with an uncompromising commitment to do things the right way, always. We drive positive societal impact through our steadfast focus on

We're unstoppable in our quest to create genuine, positive opportunities for everyone. It makes us a stronger company when we bring together our unique talents and perspectives to offer the best for

our customers.

Goals

We empower as many people as possible with the connectivity and tools needed to take part and succeed in today's digital world.

Goals

We take bold steps to improve our impact on the planet by reducing our environmental footprint and using our network, resources, and partnerships to enable a more sustainable future for all.

Goals

increasing digital equity across the United States, strongly championing diversity, equity, and inclusion within and outside of our walls, and taking bold steps to manage our environmental footprint.

Complete 54 Equity In Action DE&I promises by 2025, driving progress across our business, supply chain, and in our communities.

Hire 10,000 veterans and military spouses by the end of 2023. (Achieved)

Offer up to 10 million eligible student households across the U.S. with connectivity through Project 10Million and other education initiatives.

Connect up to 200,000 newcomers with

free voice and text service from Metro by T-Mobile for one year through our partnership with Welcome.US.

Achieve net-zero emissions across our entire carbon footprint by 2040.

Continue to source renewable energy equivalent to 100% of total electricity usage.

Achieve a 95% reduction in energy consumption (MWh) per petabyte (PB) of data traffic by 2030, from a 2019 baseline.

THE T-MOBILE WAY

Responsible Business

We realize our ambitions by doing things the right way, always with integrity, responsibility, and transparency. To build trust with our customers, suppliers, business partners, and one another, we're uncompromising in our ethical code and uphold strong corporate governance policies and practices.

Goals

Achieve a 98%+ enterprise completion rate annually for our Integrity365 Code of Business Conduct trainings.

Build a more sustainable supply chain by engaging the majority of our suppliers through social and environmental assessments.

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ESG APPROACH CONTINUED

ESG MATERIALITY

DOUBLE MATERIALITY

OUR ASSESSMENT PROCESS

ASSESSMENT

The double materiality process assesses topics based

Identify List of Topics

A list of 20 ESG material topics was developed using the following inputs:

AND STAKEHOLDER ENGAGEMENT

on financial materiality and impact materiality across short- and long-term time horizons across the entire value chain.

▪

▪

T-Mobile's corporate priorities, business strategy, and enterprise risk management

Existing T-Mobile corporate responsibility reporting and previous materiality assessments

• ESG frameworks and standards
• Industry trends and benchmarking
• Ongoing stakeholder feedback

As part of our broader work to regularly assess our environmental, social, and governance (ESG) priorities, we refresh our ESG materiality assessment

Impact Materiality

Impact materiality evaluates the

potential impact we can have on society,

Understand Internal and External Stakeholder Perspectives

Stakeholder views on potential topics were gathered and analyzed, using the following methods:

every few years. These assessments help us stay on top of emerging trends, get insights into stakeholder expectations, and identify the greatest potential for impact on our business as well as on society and the environment.

Aligning with leading practices and new reporting guidelines, we conducted a double materiality

the economy, and the environment.

Financial Materiality

Financial materiality evaluates the potential impact of a topic on enterprise value.

• In-depthinterviews with internal and external stakeholders, including T-Mobile executives from across the business, civil society organizations, suppliers, industry and sustainability organizations, and investors

▪

▪

Employee and customer surveys

Desktop research to supplement stakeholder perspectives and understand potential impacts over different time horizons

assessment in 2023, identifying 20 key ESG topics for our business. The results from this assessment were validated by senior leaders and the Nominating and Corporate Governance Committee of the Board. They are also integrated into our ESG approach

and broader business strategy, including driving the focus of this year's Corporate Responsibility Report.

Synthesize and Score the Topics
Stakeholder feedback and research	Topics were then scored from
were used to assess:	low to high on two measures:
▪ The likelihood of impacts, risks,	▪ Impact of risks and opportunities
and opportunities	on the business
▪ The actual severity of impacts and	▪ Impact on society and the
magnitude of risks and opportunities	environment

 See our ESG Reporting Hubfor a more detailed description on the methodology and results.

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ESG APPROACH CONTINUED

DOUBLE MATERIALITY ASSESSMENT RESULTS

The assessment results are grouped into four categories, each reflecting the varying degrees of impact on our business operations as well as their implications for society and the environment.

• Category 1: Focus on priority topics
  Includes topics that represent the greatest areas of risk and/or have the highest impact on enterprise value, society, and/or the environment, particularly in the near term.

• Category 2: Sustain and grow strategic programming
  Includes topics that T-Mobile is expected to continue to responsibly manage or grow strategic programming around.

• Category 3: Manage foundational table stakes
  Includes foundational operational integrity topics such as our robust ethical business and compliance-driven governance practices that are necessary to manage and reduce business risk.

• Category 4: Monitor moderate topics and emerging trends
  Includes topics that do not currently represent high risk or high impact, but are still important to manage and monitor, such as product lifecycle management and waste, and emerging trends such as natural resources and biodiversity.

ONGOING STAKEHOLDER ENGAGEMENT

E ENVIRONMENTAL	S SOCIAL	G GOVERNANCE
 Climate Risk and Resilience	 Diversity, Equity, and Inclusion	 Business Continuity and
 Energy Use	 Emerging Technology and	Network Resilience
 Natural Resources and Biodiversity	Product Innovation	 Cybersecurity
 Product Lifecycle Management	 Employee Attraction,	 Data Protection and Privacy
Development, and Engagement
 Waste and Recycling	 Sustainable and Responsible
 Community Engagement and	Supply Chain
	Philanthropy	 Ethical Business Practices
	 Digital Equity	 Executive and Board Oversight
	 Employee Health, Wellness,	and Accountability
	and Safety
	 Public Policy, Partnerships,
	and Collaboration
	 Responsible Use of Products
	and Services
	 Responsible Marketing

  Learn more about our ESG material topics on the Material Topics Definitionspage.

Stakeholder relationships are a critical part of how we evolve our

ESG approach. Ongoing dialogue and engagement with our stakeholders is fundamental to advancing our work and driving progress where

it matters most. We regularly connect with customers, employees, non-profit partners, industry analysts, stockholders, suppliers, and

government officials on the topics that are most important to them as well as to share progress on our ESG performance. We also participate in external working groups and industry associations to stay informed on and prioritize the issues critical to our business and stakeholders.

For more information on our stakeholder engagement, see our ESG Materiality Assessment and Stakeholder Engagement Brief on the ESG Reporting Hub.

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OUR

GOVERNANCE

1. 2023 Governance Highlights
2. Corporate Governance and ESG Oversight

1. Ethical Business Practices

1. Cybersecurity
2. Data Protection and Privacy
3. Business Continuity and Network Resilience

1. Responsible Supply Chain

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2023 GOVERNANCE HIGHLIGHTS

OUR GOVERNANCE

#31

T-Mobile ranked #31 on JUST Capital's 2024 Ranking of America's Most JUST Companies

57%

Board diversity

8 out of 14 of our Board of Directors self-identify as women and/or members of traditionally underrepresented racial/ ethnic groups

Lead Independent Director

of the Board and Independent

Chairs of the Audit, Compensation,

and Nominating and Corporate

Governance Committees

97%

enterprise completion rate for T-Mobile's Integrity365 Code of Business Conduct training

66%

of suppliers completed environmental and social assessments through EcoVadis (based on sourceable spend)

Continued to improve our cybersecurity management, including cybersecurity technology, security protocols, monitoring

and response operations, and compliance

Accepted into the Billion Dollar Roundtable

for our commitment to supplier diversity

$3.1B

spent with suppliers from traditionally underrepresented backgrounds

compliance

(based on sourceable spend) assessments through EcoVadis

backgrounds

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