PCMag editors select and review products independently. If you buy through affiliate links, we may earn commissions, which help support our testing.

FCC Forces T-Mobile to Bolster Cybersecurity in Data Breach Settlement

Citing T-Mobile's data breaches in 2021, 2022 and 2023, the FCC orders the carrier to adopt multi-factor authentication and a 'zero trust' model for its security.

 & Michael Kan Principal Reporter

Our team tests, rates, and reviews more than 1,500 products each year to help you make better buying decisions and get more from technology.

Our Expert
LOOK INSIDE PC LABS HOW WE TEST
65 EXPERTS
43 YEARS
41,500+ REVIEWS
(David Ryder/Bloomberg via Getty Images)

T-Mobile has agreed to bolster its cybersecurity after suffering data breaches in 2021, 2022, and 2023, according to a settlement with US regulators. 

On Monday, the FCC announced a deal to settle its investigation into past data breaches, which ensnared over 76 million people during the 2021 breach

The FCC called the deal “groundbreaking” in terms of data protection because it’ll require T-Mobile to adopt best practices in the cybersecurity industry. Specifically, the company will need to implement a  “a modern zero trust architecture,” segment its internal networks, and institute multi-factor authentication for all employees. 

In addition, the FCC is fining the carrier $15.8 million, but the money will go to the US Treasury. T-Mobile also has to commit “spending an additional $15,750,000 over the next two years to strengthen its cybersecurity program” — a relatively small sum for a company that made $8.3 billion in net income last year.

Even so, the commission expects T-Mobile will ultimately need to spend a fortune to bring its cybersecurity practices up to the requirements of the settlement. “Implementing these practices will require significant—and long overdue—investments,” the FCC says. “To do so at T-Mobile’s scale will likely require expenditures an order of magnitude greater than the civil penalty here.”

The announcement arrives more than a year after T-Mobile previously vowed to spend $150 million to revamp its data security. In 2021, the carrier suffered a breach after a hacker discovered an unprotected T-Mobile router on the open internet, which allowed him to steal personal information —such as names, addresses, Social Security numbers and dates of birth— for 76.6 million people. 

In 2022, other cyber criminals were able to steal T-Mobile customer data by using a phishing attack and a SIM swap to gain access to company employee accounts. In 2023, hackers struck again by using stolen account credentials to access a T-Mobile sales application and by exploiting misconfigured permissions in a company API.  

The FCC now says its settlement is designed to prevent future intrusions and minimize the reach of a breach if T-Mobile is ever hacked again. “We will continue to send a strong message to providers entrusted with this delicate information that they need to beef up their systems or there will be consequences,” FCC Chairwoman Jessica Rosenworcel said in the announcement. 

In response to the settlement, T-Mobile said: "We take our responsibility to protect our customers’ information very seriously. This consent decree is a resolution of incidents that occurred years ago and were immediately addressed. We have made significant investments in strengthening and advancing our cybersecurity program and will continue to do so."

Users hoping to receive compensation will need to bank on a class-action lawsuit. In 2022, T-Mobile agreed to a $350 million settlement for the 2021 data breach. However, it looks like the settlement is still going through the courts for final approval.

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

Read full bio