T-Mobile Confirms Data Breach, Unclear If Personal Customer Data Was Accessed

T-Mobile today confirmed that some of its data had been accessed without authorization in a breach that may impact more than 100 million of its users.

tmobilelogo
Over the weekend, T-Mobile began investigating a forum post that offered data from more than 100 million people. T-Mobile was not mentioned in that post, but the person selling the data told Motherboard that it had come from T-Mobile's servers, thus leading T-Mobile to look into it. The hacker who spoke to Motherboard claimed that several T-Mobile servers had been breached.

T-Mobile has now confirmed that there was indeed unauthorized access to some customer data, but T-Mobile in a statement says it does not yet know if personal customer data has been accessed.

We have been working around the clock to investigate claims being made that T-Mobile data may have been illegally accessed. We take the protection of our customers very seriously and we are conducting an extensive analysis alongside digital forensic experts to understand the validity of these claims, and we are coordinating with law enforcement.

We have determined that unauthorized access to some T-Mobile data occurred, however we have not yet determined that there is any personal customer data involved. We are confident that the entry point used to gain access has been closed, and we are continuing our deep technical review of the situation across our systems to identify the nature of any data that was illegally accessed. This investigation will take some time but we are working with the highest degree of urgency. Until we have completed this assessment we cannot confirm the reported number of records affected or the validity of statements made by others.

We understand that customers will have questions and concerns, and resolving those is critically important to us. Once we have a more complete and verified understanding of what occurred, we will proactively communicate with our customers and other stakeholders.

According to the original forum post, the data for sale includes social security numbers, phone numbers, names, physical addresses, IMEI numbers, and driver licenses information. Motherboard said that it was provided with some samples of data and was able to confirm that they contained accurate information on T-Mobile customers.

T-Mobile says that the entry point used to gain access to the data has been closed, and it is now conducting a "deep technical review" of the situation to determine the nature of the data that was obtained. The company will not be able to confirm the reported number of records affected until the internal investigation is complete, and it plans to proactively communicate with customers when the information is available.

Popular Stories

iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
iPhone 14 Pro Dynamic Island

iPhone 18 Pro Leak Adds New Evidence for Under-Display Face ID

Monday December 8, 2025 4:54 am PST by
Apple is actively testing under-screen Face ID for next year's iPhone 18 Pro models using a special "spliced micro-transparent glass" window built into the display, claims a Chinese leaker. According to "Smart Pikachu," a Weibo account that has previously shared accurate supply-chain details on Chinese Android hardware, Apple is testing the special glass as a way to let the TrueDepth...
iOS 26

Apple Seeds Second iOS 26.2 Release Candidate to Developers and Public Beta Testers

Monday December 8, 2025 10:18 am PST by
Apple today seeded the second release candidate version of iOS 26.2 to developers and public beta testers, with the software coming one week after Apple seeded the first RC. The release candidate represents the final version iOS 26.2 that will be provided to the public if no further bugs are found. Registered developers and public beta testers can download the betas from the Settings app on...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Monday December 1, 2025 2:40 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
Johny Srouji

Apple's Chipmaking Chief Johny Srouji Responds to Report About Him Potentially Leaving

Monday December 8, 2025 9:23 am PST by
Apple's chipmaking chief Johny Srouji has reportedly indicated that he plans to continue working for the company for the foreseeable future. "I love my team, and I love my job at Apple, and I don't plan on leaving anytime soon," said Srouji, in a memo obtained by Bloomberg's Mark Gurman. Here is Srouji's full memo, as shared by Bloomberg:I know you've been reading all kind of rumors and...
Johny Srouji

Apple Chip Chief Johny Srouji Could Be Next to Go as Exodus Continues

Sunday December 7, 2025 10:41 am PST by
Apple's senior vice president of hardware technologies Johny Srouji could be the next leading executive to leave the company amid an alarming exodus of leading employees, Bloomberg's Mark Gurman reports. Srouji apparently recently told CEO Tim Cook that he is "seriously considering leaving" in the near future. He intends to join another company if he departs. Srouji leads Apple's chip design ...
google pixel 10

Switching Between iPhone and Android Will Get Easier With New Apple and Google Collaboration

Monday December 8, 2025 11:10 am PST by
Apple and Google are teaming up to make it easier for users to switch between iPhone and Android smartphones, according to 9to5Google. There is a new Android Canary build available today that simplifies data transfer between two smartphones, and Apple is going to implement the functionality in an upcoming iOS 26 beta. Apple already has a Move to iOS app for transferring data from an Android...
top stories 2025 12 04a

Top Stories: iOS 26.2 Coming Soon, Apple Execs Depart, and More

Saturday December 6, 2025 6:00 am PST by
You'd expect things to be starting to wind down for the holidays by now, but that doesn't seem to be the case yet in the world of Apple news, with Apple just about ready to release iOS 26.2 and other operating system updates to the public. There was also a flurry of news this week about Apple executive departures, some expected and some not so expected, while we also learned that Apple and...
Apple Fitness Plus expansion hero

Apple Fitness+ Coming to 28 New Regions With Digital Voice Dubbing

Monday December 8, 2025 6:19 am PST by
Apple today announced that Fitness+ is expanding to 28 new markets on December 15 in the service's largest international rollout since launch, accompanied by new language dubbing and a K-Pop music genre. Apple Fitness+ will become available in Chile, Hong Kong, India, the Netherlands, Singapore, Taiwan, and additional regions on December 15, with Japan scheduled to follow early next year....

Top Rated Comments

LawJolla Avatar
56 months ago
I own a small car dealership and I encrypt all of my customer's data at rest. I could hand my database to a hacker with next to nothing compromised. You'd need to dump my database and steal the secret in memory key.

In 2021 these billion dollar companies need to be held accountable. Unacceptable.
Score: 65 Votes (Like | Disagree)
lip008 Avatar
56 months ago
Anytime I've had to go into Sprint or T-Mobile they required a scan of my driver's license. It's been a pita to access the account or go into the store for a while now all in the name of security! Guess that was all for nothing! Status quo....we'll get 18 months of credit monitoring and $8 from the lawsuit outcome in 2025...
Score: 23 Votes (Like | Disagree)
Wags Avatar
56 months ago
Companies should be fined heavily for stuff like this. Many don’t invest enough resources to be responsible but not enough public outrage. Will be no news by tomorrow.
Score: 20 Votes (Like | Disagree)
Graphikos Avatar
56 months ago

I own a small car dealership and I encrypt all of my customer's data at rest. I could hand my database to a hacker with next to nothing compromised. You'd need to dump my database and steal the secret in memory key.

In 2021 these companies need to be held accountable. Unacceptable.
That all sounds nice in theory but as we know nothing is ever 100% secure. For a small business, you can more easily lock things down and restrict access. When you talk about large corporations with so many different facets and functions it becomes much harder to grant access to those who need it, trust everyone that is involved, and keep hardware and software secure. There are just so many more variables that you really can't compare.
Score: 17 Votes (Like | Disagree)
SFjohn Avatar
56 months ago
That’s totally unacceptable in this day and age. As a T-mobile customer for years now, this is really bad. Social Security numbers, phone numbers, names, physical addresses, IMEI numbers, and driver licenses information! What else? Mother’s Maiden Name? T-Mobile needs to pay for a lifetime of fraud monitoring on every account stolen!
Score: 14 Votes (Like | Disagree)
ouimetnick Avatar
56 months ago
? I switched from AT&T to T-Mobile this past May…. ??
Score: 12 Votes (Like | Disagree)