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A T-Mobile billboard in Times Square. Photo: Noam Galai/Getty Images

T-Mobile customers endured a daylong service outage Monday that affected users nationwide.

Why it matters: Some had speculated that the issue was a more widespread attack on multiple internet services, but it looks like many of the problems reported at other carriers and internet services were tied to the T-Mobile outages — either calls that failed because they involved a T-Mobile customer or internet services that T-Mobile customers couldn't reach.

What they're saying: T-Mobile technology chief Neville Ray confirmed the issues on Twitter during the day and CEO Mike Sievert posted a note late Monday saying the issue was an "IP traffic related issue" that created capacity issues in the network core.

  • CloudFlare CEO Matthew Prince said in a series of tweets that T-Mobile's issues were the result of a configuration change that led to a series of cascading issues. He also said the problems were limited to T-Mobile and shot down rumors of broader internet issues or a deliberate attack.

The big picture: Such cellular network outages are rare, but not unheard of.

  • Nonetheless, FCC chairman Ajit Pai said Monday night that his agency was investigating the issue.
  • "The T-Mobile network outage is unacceptable," Pai said in a tweet. "We're demanding answers — and so are American consumers."

Go deeper

Everyone wants to be an influencer

Illustration: Aïda Amer/Axios

The number of people looking to become online influencers has exploded during the pandemic.

Why it matters: Almost anyone can find themselves in a position to become an influencer, and brands are throwing billions of dollars at online content creators.

At least 3 dead after Amtrak train derails in Montana

Photo: Jacob Cordeiro/Twitter

An Amtrak train derailed near Joplin, Montana, resulting in at least three deaths and multiple injuries to passengers and crew on Saturday, per authorities and a company statement.

The big picture: 141 passengers and 16 crew members were estimated to be on the Empire Builder train, traveling from Chicago to Seattle and Portland, when eight of the 10 cars derailed about 4p.m., Amtrak said early Sunday.

Updated 9 hours ago - Politics & Policy

Federal judge blocks vaccine mandate for NYC teachers

Students are dismissed from the first day of school at PS 133 in Brooklyn on Sept. 13. Photo: Michael Nagle/Xinhua via Getty Images

A federal appeals court is set to hear a challenge Wednesday to a vaccine mandate planned for New York City school employees.

Why it matters The vaccine mandate was set to begin on Monday, prompting concerns over staffing shortages in schools across the nation's largest school system. But a judge on Friday temporarily blocked the measure, per AP.

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