T-Mobile US

“Network Strategy Utilizing our multilayer spectrum portfolio, our mission is to become “Famous for Network” and we have been recognized by third parties for having America’s best network. We have deployed low-band, mid-band and mmWave spectrum dedicated for 5G across our dense and broad network to create what we believe is America’s largest, fastest, most awarded and most advanced 5G network.”

Annual report 2025A · The company itself

“We believe our spectrum position and focus on technology leadership will continue to drive network differentiation. Our innovative Customer-Driven Coverage (“CDC”) approach to network investments, and leadership in deploying the latest network technologies including Massive Multiple-input Multiple-output (“Massive MIMO”), Voice over New Radio (“VoNR”), Low Latency, Low Loss, Scalable Throughput (“L4S”), four-carrier and higher order aggregation, dynamic network slicing and the U.S.’s first broad deployment of 5G Advanced, are enabled by our scaled nationwide 5G standalone network.”

Annual report 2025A · The company itself

“Business Business Overview and Strategy Un-carrier Strategy As America’s supercharged Un-carrier, we have disrupted the telecommunications industry by actively engaging with and listening to our customers and focusing on eliminating their pain points. Our customers benefit from what we believe is an unmatched combination of the best value and best network, alongside an unwavering focus on offering them the best possible service experience and an undisputable drive for disruptive innovation in wireless and beyond.”

Annual report 2025A · The company itself

“Services and Products We provide wireless communications and broadband services through a variety of service plan options. We also offer for sale to customers a wide selection of wireless devices, including smartphones, wearables, tablets, 5G broadband gateways and other mobile communication devices that are manufactured by various suppliers.”

Annual report 2025A · The company itself

“In addition to our wireless communications services, we offer complementary broadband services including 5G broadband, which is a fixed wireless product available to tens of millions of domestic households utilizing the excess capacity of our nationwide 5G network, and fiber, expanding broadband access and choices for some consumers.”

Annual report 2025A · The company itself

“Additionally, we have faced and will continue to face various litigations alleging that our products or services infringe patents or other intellectual property of third parties, including potential litigation arising from our use of AI. If successful, these litigations could result in an award of financial compensation, including damages or royalties, business disruptions, reputational harm, or an order requiring that we cease offering, selling, and using the relevant products, equipment, services, and network functions.”

Annual report 2025A · The company itself

“We believe our spectrum position and focus on technology leadership will continue to drive network differentiation. Our innovative Customer-Driven Coverage (“CDC”) approach to network investments, and leadership in deploying the latest network technologies including Massive Multiple-input Multiple-output (“Massive MIMO”), Voice over New Radio (“VoNR”), Low Latency, Low Loss, Scalable Throughput (“L4S”), four-carrier and higher order aggregation, dynamic network slicing and the U.S.’s first broad deployment of 5G Advanced, are enabled by our scaled nationwide 5G standalone network.”

Annual report 2025A · The company itself

“As part of our relentless, customer-first focus, we are transforming into an AI-enabled, data-informed, digital-first organization to continue delivering differentiated experiences to our customers. Leveraging the latest AI technology and digital capabilities, we are pioneering new approaches to serving customers with a platform to better anticipate and proactively solve their issues, offering personalized self-service options and taking authorized actions on their behalf, while simultaneously creating large-format customer experience stores for customers looking for an immersive experience.”

Annual report 2025A · The company itself

“Our most significant expenses relate to operating and expanding our network, providing a full range of devices, acquiring and retaining high-quality customers and compensating employees.”

Annual report 2025A · The company itself

“Table of Contents Human Capital Employees As of December 31, 2025, we employed approximately 75,000 full-time and part-time employees, including network, retail, administrative and customer support functions.”

Annual report 2025A · The company itself

“We attract and retain our workforce through a dynamic and inclusive culture and by providing a comprehensive set of benefits, including: •Competitive medical, dental and vision benefits; •Family-building benefits designed to meet the various needs of our employees, including IVF and IUI, adoption and surrogacy benefits; •Annual stock grants to all full-time and part-time employees and a discounted Employee Stock Purchase Program; •A 401(k) Savings Plan; •Nationwide minimum pay of at least $20 per hour to all full-time and part-time employees; •LiveMagenta: a custom-branded program for employee engagement and well-being, including free access to life coaches, financial coaches and tools for healthy living; •Access to personal health advocates offering independent guidance; •A generous paid time off program, including paid family leave; •Tuition assistance for all full-time and part-time employees, including full tuition partnerships with multiple schools; and •A matching program for employee donations and volunteering.”

Annual report 2025A · The company itself

“Our ability to attract and retain customers will depend on multiple factors, such as network quality and capacity, customer service excellence, effective marketing strategies, competitive pricing, compelling value propositions, and distribution and logistics capabilities. Additionally, targeted marketing approaches for a broad spectrum of customer segments, coupled with continuous innovation in products and services, are essential for retaining and expanding our customer base.”

Annual report 2025A · The company itself

“We serve prepaid customers under the T-Mobile, Metro by T-Mobile, Mint Mobile and Ultra Mobile brands.”

Annual report 2025A · The company itself

“Certain international data protection regimes, including those in the European Union and the United Kingdom, impose specific obligations on the collection, use, sharing, and transfer of personal data. Compliance with these obligations may increase operational complexity and costs, limit our ability to use or transfer data across jurisdictions, or require changes to our products, services, or business practices.”

Annual report 2025A · The company itself

“We offer regulated financial services products. These products expose us to a wide variety of state and federal regulations.”

Annual report 2025A · The company itself

“As part of our relentless, customer-first focus, we are transforming into an AI-enabled, data-informed, digital-first organization to continue delivering differentiated experiences to our customers. Leveraging the latest AI technology and digital capabilities, we are pioneering new approaches to serving customers with a platform to better anticipate and proactively solve their issues, offering personalized self-service options and taking authorized actions on their behalf, while simultaneously creating large-format customer experience stores for customers looking for an immersive experience.”

Annual report 2025A · The company itself

“Customers We provide wireless communications and broadband services to a variety of customers needing connectivity, but focus primarily on two categories of customers: •Postpaid customers generally are qualified to pay after receiving service utilizing phones, 5G broadband gateways, fiber connections, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and internet of things (“IoT”)). We serve consumers as well as business customers, who are provided services under the T-Mobile for Business brand. •Prepaid customers generally pay for service in advance.”

Annual report 2025A · The company itself

“Customers We provide wireless communications and broadband services to a variety of customers needing connectivity, but focus primarily on two categories of customers: •Postpaid customers generally are qualified to pay after receiving service utilizing phones, 5G broadband gateways, fiber connections, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and internet of things (“IoT”)). We serve consumers as well as business customers, who are provided services under the T-Mobile for Business brand. •Prepaid customers generally pay for service in advance.”

Annual report 2025A · The company itself

“For example, the FCC has rules regarding provision of 911, 988 and E-911 services, porting telephone numbers, interconnection, roaming, consumer broadband labels, robocalling/robotexting, disabilities access, privacy and cybersecurity, consumer protection and the universal service and Lifeline programs.”

Annual report 2025A · The company itself

“We have experienced cyberattacks and may experience disruptions, data loss and other security breaches, whether directly or indirectly through third parties whose products and services we rely on in operating our business. Our business involves the receipt, storage, and transmission of confidential information about our customers, such as sensitive personal, account, and payment information, confidential information about our employees and suppliers, and other sensitive information about our Company, such as our business plans, transactions, financial information, and intellectual property (collectively, “Confidential Information”).”

Annual report 2025A · The company itself

“We are subject to persistent cyberattacks and threats to our business from bad actors seeking to gain unauthorized access to Confidential Information and compromise Systems to undermine availability or integrity. They are perpetrated by a variety of 12 Table of Contents groups and persons, including nation state-sponsored parties, malicious actors, employees, contractors, and other third parties. Some actors reside in jurisdictions where law enforcement measures to address such attacks are ineffective or unavailable. Cyberattacks against companies like ours are increasing in frequency and scope of potential harm over time, and the methods used to gain unauthorized access constantly evolve, making it increasingly difficult to anticipate, prevent, and detect incidents successfully in every instance.”

Annual report 2025A · The company itself

“In addition, we routinely rely upon third-party providers whose products and services are used in our business. These third-party providers have experienced, and will continue to experience, cyberattacks that involve attempts to access our Confidential Information and/or to create operational risk that could materially and adversely affect our business, and these providers also face other security challenges common to all parties that collect and process information.”

Annual report 2025A · The company itself

“We have, and we expect that we will continue to have, a substantial amount of debt. Our substantial level of indebtedness could have the effect of, among other things, reducing our flexibility in responding to changing business, economic, market, and industry conditions and increasing the amount of cash required to service our debt.”

Annual report 2025A · The company itself

“Instability in the global financial markets, inflation, policies of various governmental and regulatory agencies, including changes in monetary policy and interest rates, and other general economic conditions could lead to volatility in the credit and equity markets. This volatility could limit our access to the capital markets, leading to higher borrowing costs or, in some cases, an inability to obtain financing on terms that are acceptable to us or at all.”

Annual report 2025A · The company itself

“Instability in the global financial markets, inflation, policies of various governmental and regulatory agencies, including changes in monetary policy and interest rates, and other general economic conditions could lead to volatility in the credit and equity markets. This volatility could limit our access to the capital markets, leading to higher borrowing costs or, in some cases, an inability to obtain financing on terms that are acceptable to us or at all.”

Annual report 2025A · The company itself

“We are subject to regulatory oversight by various federal, state, and local agencies, as well as judicial review and actions, on issues related to the telecommunications industry that include, but are not limited to, roaming, interconnection, spectrum allocation and licensing, facilities siting, pole attachments, intercarrier compensation, Universal Service Fund (“USF”), 911 services, robocalling/robotexting, consumer protection, consumer privacy, and cybersecurity.”

Annual report 2025A · The company itself

“AI-related laws and regulations continue to remain uncertain and may vary from jurisdiction to jurisdiction. Our obligations to comply with the evolving legal and regulatory landscape may require us to incur significant additional costs or limit our ability to incorporate certain AI capabilities into our business operations or product offerings.”

Annual report 2025A · The company itself

“The telecommunications industry is highly competitive. As the industry reaches saturation, competition in all market segments, including prepaid, postpaid, enterprise and government customers will likely further intensify, putting pressure on pricing and/or margins for us and all our competitors.”

Annual report 2025A · The company itself

“Our ability to service our substantial debt obligations will depend on future performance, which will be affected by business, economic, market, and industry conditions and other factors. There is no guarantee that we will be able to generate sufficient cash flow to service our debt obligations when due.”

Annual report 2025A · The company itself

“Furthermore, under existing law, no more than 20% of an FCC licensee’s capital stock may be directly owned, or no more than 25% indirectly owned, or voted by non-U.S. citizens or their representatives, by a foreign government or its representatives or by a foreign corporation. If an FCC licensee is controlled by another entity, up to 25% of that entity’s capital stock may be owned or voted by non-U.S. citizens or their representatives, by a foreign government or its representatives or by a foreign corporation.”

Annual report 2025A · The company itself

“Substantially all of our revenues for the years ended December 31, 2025, 2024 and 2023, were earned in the United States, including Puerto Rico and the U.S. Virgin Islands.”

Annual report 2025A · The company itself

“Environmental Sustainability Efficiencies and Reducing Our Carbon Footprint We are actively working to identify efficiencies in our energy usage and reduce our environmental impact by: •Pursuing a science-based net-zero emissions target for 2040, covering Scope 1, 2 and 3 emissions; •Investing in renewable energy, meeting our RE100 pledge since 2021, through initiatives such as Virtual Power Purchasing Agreements and clean energy projects expected to produce over 3.4 million megawatt hours annually; •Enhancing energy efficiency in our network and facilities, including retail stores, data centers, and cell sites; and •Promoting a circular economy through a robust device reuse and recycling program.”

Annual report 2025A · The company itself

“As of December 31, 2025, we held €4.8 billion in EUR-denominated Senior Notes, which are subject to foreign currency exchange rate fluctuations. We have entered into cross-currency swap agreements that qualify and have been designated as fair value hedges of our EUR-denominated debt, mitigating our exposure to foreign currency transaction gains and losses.”

Annual report 2025A · The company itself

“Environmental Sustainability Efficiencies and Reducing Our Carbon Footprint We are actively working to identify efficiencies in our energy usage and reduce our environmental impact by: •Pursuing a science-based net-zero emissions target for 2040, covering Scope 1, 2 and 3 emissions; •Investing in renewable energy, meeting our RE100 pledge since 2021, through initiatives such as Virtual Power Purchasing Agreements and clean energy projects expected to produce over 3.4 million megawatt hours annually; •Enhancing energy efficiency in our network and facilities, including retail stores, data centers, and cell sites; and •Promoting a circular economy through a robust device reuse and recycling program.”

Annual report 2025A · The company itself

“Notwithstanding this federal preemption, several states are considering or have passed laws or regulations that could potentially set prices, minimum performance standards and/or restrictions on service discontinuation that could impact our business in those states. For example, California has passed separate privacy and net neutrality legislation, while many others have passed privacy laws, and New York has passed a broadband rate-setting law.”

Annual report 2025A · The company itself

“Our most significant expenses relate to operating and expanding our network, providing a full range of devices, acquiring and retaining high-quality customers and compensating employees.”

Annual report 2025A · The company itself

“Table of Contents Additionally, Congress’s and the FCC’s allocation of additional spectrum for broadband commercial mobile radio service (“CMRS”), which includes cellular, PCS and other wireless services, could significantly increase and intensify competition.”

Annual report 2025A · The company itself