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Photo: David Paul Morris/Bloomberg via Getty Images

Personal data, including Social Security numbers, of more than 40 million former and prospective customers who applied for T-Mobile credit were exposed in a data breach, the company said Tuesday.

The big picture: About 7.8 million current T-Mobile postpaid customers were also affected. Some of the data accessed included names, dates of birth, SSN and driver's license/ID information.

  • "Importantly, no phone numbers, account numbers, PINs, passwords or financial information were compromised in any of these files of customers or prospective customers," the company said.
  • The breach, however, did expose, the names, phone numbers and account PINs of approximately 850,000 active T-Mobile prepaid customers, the company confirmed. Those PINs have been reset, T-Mobile said.
  • "The company didn't disclose the extent to which the various victim groups overlapped," the Wall Street Journal noted.
  • The announcement comes just days after T-Mobile said it was investigating a breach after someone in an online forum offered to sell customer information, per the Journal.

What they're saying: "We take our customers' protection very seriously and we will continue to work around the clock on this forensic investigation to ensure we are taking care of our customers in light of this malicious attack," T-Mobile said, adding that its investigation was ongoing.

  • The company said it would immediately offer two years of free identity protection services.

Go deeper

Oct 26, 2021 - Technology

Apple's privacy changes eat rivals' businesses

Expand chart
Data: Branch; Chart: Kavya Beheraj/Axios

The latest earnings reports from Facebook and Snapchat show that Apple's mobile privacy measures are beginning to have a material impact on the ad businesses of some of its Big Tech competitors.

Why it matters: While experts don't think Apple's moves will do long-term damage to its rivals, they will force social media companies to invest heavily in new technology and products for the next few years — all while their ads business continues to experience significant headwinds.

Why 401(k) rollovers are so annoying

Illustration: Aïda Amer/Axios

If you happened to change jobs recently, you may have tried to transfer your retirement account from your former employer into an Individual Retirement Account or your new employer's 401(k) plan. If so, you probably encountered a bureaucratic gantlet — and you're not alone.

Why it matters: Kludgey processes around retirement account transfers result in people losing track of their funds, giving up important tax advantages, or otherwise disadvantaging themselves and being less prepared for retirement.

The hard math behind America's labor shortage

Data: Bureau of Labor Statistics, Congressional Budget Office; Chart: Axios Visuals

Yes, the pandemic has created unusual temporary labor market dynamics. But in the bigger picture, the 2010s were a golden age for companies seeking cheap labor. The 2020s are not.

The big picture: In the 2010s, the massive millennial generation was entering the workforce, the massive baby bo0m generation was still hard at work, and there was a multi-year hangover from the deep recession caused by the global financial crisis.