• T-Mobile US Inc (NASDAQ: TMUS) CEO Mike Sievert has apologized to the customers for the security hack that compromised the data of millions of accounts.

  • T-Mobile struck long-term partnerships with cybersecurity firm Mandiant and consulting firm KPMG LLG after the hack.

  • T-Mobile said it is actively coordinating with law enforcement on a criminal investigation.

  • See Also: The hacker made startling revelations on the company's security system on Thursday.

  • Sievert assured that the company had plugged the security hole, alleviating concerns over the hack's ongoing risk to customer data.

  • Hackers gained access to the company's testing environments and then used brute force attacks and other methods to make their way into other IT servers, including customer data.

  • T-Mobile US claimed to have notified nearly all current T-Mobile account holders who had their data compromised.

  • T-Mobile offered two years of free identity-protection services with McAfee's I.D. theft protection to the breach victims.

  • It recommends customers sign up for its free scam-blocking protection through Scam Shield.

  • T-Mobile was hacked twice in 2020 and in 2018, a network breach that compromised 2.5 million customers' data.

  • T-Mobile is the subject of at least two class-action lawsuits for failing to protect data. Last week, the U.S. Federal Communications Commission also launched an investigation on the breach.

  • Price Action: TMUS shares traded higher by 0.64% at $138.46 on the last check Friday.

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  • T-Mobile Hacker Makes Shocking Revelations: WSJ

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