EXHIBIT 1.01
T-Mobile US, Inc.
Conflict Minerals Report for the Year Ended December 31, 2023
This Conflict Minerals Report is presented to comply with Rule 13p-1 under the Securities Exchange Act
of 1934, as amended (the “Rules”). The Rules require issuers to disclose information regarding the use and origin of conflict minerals necessary for the functionality or production of products manufactured or contracted to be manufactured
by such issuers. The Rules define “conflict minerals” as cassiterite, columbite-tantalite, gold, wolframite and their derivatives, which are limited to tin, tantalum, tungsten and gold (referred to collectively as “3TG”). The
purpose of the Rules is to identify whether an issuer’s use of 3TG may have directly or indirectly financed or benefitted armed groups in the Democratic Republic of Congo and its adjoining countries (the “DRC Region” or “Covered
Countries”), even though the use of conflict minerals from Covered Countries is not prohibited under U.S. law.
Introduction
T-Mobile US, Inc. (“T-Mobile”) is America’s Un-carrier, delivering an advanced 4G LTE and transformative nationwide 5G network that offers reliable connectivity for all. T-Mobile’s customers benefit from its
combination of value and quality, focus on offering them the best possible service experience, and drive for disruption that creates competition and innovation in wireless and beyond. Based in Bellevue, Washington,
T-Mobile provides services, devices and accessories across its flagship brands, T-Mobile and Metro by T-Mobile.
T-Mobile believes its suppliers are a valuable extension of its business and corporate values. T-Mobile’s Supplier Code of Conduct outlines expectations around ethical business practices for its suppliers. T-Mobile requires its suppliers to operate in full
compliance with laws, rules, regulations, and ethical standards of the country in which they operate or provide products or services. T-Mobile also expects its suppliers to share its commitment to ethical
conduct and environmentally responsible business practices while they conduct business with or on behalf of T-Mobile. T-Mobile employs a third-party risk management
process to screen for anti-corruption, global sanctions, human rights, and environmental risks before engaging with a supplier. T-Mobile’s third-party risk management process continuously monitors current
suppliers for supply chain risks.
T-Mobile’s suppliers are also required to follow its Responsible Sourcing
Guidelines, which set forth the Company’s expectations regarding sourcing practices and supply chain due diligence. T-Mobile’s Responsible Sourcing Guidelines require suppliers to conduct their own
due diligence into the source and chain of custody of any conflict minerals used in products supplied to T-Mobile, provide full transparency of the mineral supply chain back to the mining source by using a
robust and verifiable traceability system, adopt a conflict minerals policy and supplier due diligence practices consistent with US law and international standards, respond to T-Mobile’s inquiries about
conflict minerals and verify their source and chain of custody, and provide information about the specific smelters and refiners that supplied conflict minerals and their countries of origin.
Pursuant to the Rules, T-Mobile undertook to determine whether any products that it manufactured or contracted to
manufacture during the calendar year ended December 31, 2023 (the “Reporting Period”) contained conflict minerals necessary for the functionality or production of such products. As a result,
T-Mobile determined that, during the Reporting Period, T-Mobile contracted to manufacture the following product (“Covered Product”) that contains 3TG necessary
for the functionality or production of the product:
Suppliers of 3TG used in the Covered Product either sourced their materials from countries outside the DRC Region or conform to international responsible
mineral sourcing standards.
T-Mobile is considered a downstream purchaser in the mineral supply chain because it
does not extract, process or refine 3TG and does not have a direct relationship with any 3TG mines, smelters or refiners. As a result, T-Mobile relies on its direct suppliers, who in turn rely on their
suppliers, to assist with its reasonable country of origin inquiry and due diligence efforts for the minerals contained in the Covered Product.