BBB National Programs’ National Advertising Division (NAD) announced today that it will refer T-Mobile US, Inc. to the Federal Trade Commission and appropriate state Attorneys General for further review after the carrier declined to participate in a self-regulatory challenge brought by rival AT&T Services, Inc. concerning advertised 5G network capacity superiority.
The challenge centered on T-Mobile’s repeated assertions that its 5G network delivers greater capacity than competing networks. These claims have appeared prominently across multiple channels, including the company’s official website, YouTube videos, Facebook posts, online press releases, and materials used at promotional events. AT&T, a direct competitor in the wireless telecommunications sector, argued that the statements required substantiation through the industry’s established self-regulatory process.
In a statement sent to Cord Cutters News T-Mobile’s spokesperson said: “We are disappointed that the NAD has made the decision to refer this matter. T-Mobile has long been and continues to be a strong supporter of the National Advertising Division (NAD) and self-regulation. AT&T has publicly stated in a federal lawsuit against NAD’s parent organization that AT&T does not believe it is bound by any of the rules or agreements that come with participation in proceedings before the NAD self-regulatory industry body. We believe the claim that is being challenged is well substantiated and true, but due to AT&T’s stated position, T-Mobile has serious confidentiality concerns with any information that would have to be shared in an NAD proceeding initiated by AT&T, which led T-Mobile to decline to participate in this specific proceeding pending the outcome of AT&T’s federal litigation.”
NAD, which operates as part of BBB National Programs and handles advertising disputes voluntarily submitted by companies, opened the inquiry earlier this year following AT&T’s formal challenge. In response, T-Mobile informed NAD that, despite its historical support for the self-regulatory system, it would not participate in this particular proceeding. The carrier cited an ongoing federal lawsuit filed by AT&T against BBB National Programs itself as the primary reason for its non-participation.
Because T-Mobile chose not to engage in the NAD process or provide substantive responses to the claims at issue, NAD determined that it had no alternative but to close its file and escalate the matter to regulatory authorities. Under its standard procedures, when a company declines to take part in a challenge, NAD refers the advertising in question to the FTC and relevant state Attorneys General for potential enforcement action. Additionally, NAD will notify the digital platforms that hosted the challenged materials – platforms with which NAD maintains cooperative reporting relationships – so they may review the content under their own policies.
The referral marks another chapter in the intensifying marketing battles among major U.S. wireless carriers as they compete for customers in the 5G era. Network capacity, coverage, and speed claims have become central to advertising strategies, often leading to disputes over the accuracy and adequacy of supporting data. While many companies routinely participate in NAD proceedings to resolve such challenges without government involvement, refusals to engage trigger automatic regulatory escalation.
The underlying federal litigation referenced by T-Mobile involves separate allegations by AT&T against BBB National Programs and is pending in U.S. district court. Details of that lawsuit have not been cited as directly overlapping with the substance of the 5G capacity claims but were sufficient, in T-Mobile’s view, to justify stepping away from the self-regulatory forum in this instance.
NAD referrals do not constitute findings of wrongdoing; they simply transfer oversight to government regulators who possess broader investigative and enforcement powers. The FTC and state Attorneys General now have the option to open their own inquiries into whether T-Mobile’s 5G capacity representations comply with federal and state laws governing deceptive advertising.
Meanwhile, the challenged advertising remains active across T-Mobile’s various channels pending any regulatory or platform action. Consumers continue to encounter the capacity superiority messaging as the carriers head into the critical 2026 upgrade cycle.
BBB National Programs maintains a public library of case decision summaries, and full texts of NAD decisions are available through its online archive subscription service. The organization emphasized that today’s announcement is issued solely for informational purposes and is not intended for use in advertising or promotion by any party.
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