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T-Mobile Data Breach Exposes One Million Prepaid Accounts

Date: 12/10/2019

Home Help Center T-Mobile Data Breach Exposes One Million Prepaid Accounts

T-Mobile has become the most recent telecom giant to announce a data breach affecting a large number of U.S. customers. As part of the T-Mobile data breach, more than one million prepaid service accounts were affected, which included names, addresses, phone numbers and information about customers’ rate plans, calling features and international calling.

This information may not appear to be very damaging. After all, there is no financial information or identifying data from the T-Mobile data breach that could allow thieves to open a new line of credit or a new account. However, the information that was compromised could still be used for malicious purposes. By having detailed information on what plan a customer has and what calling features they subscribe to, it would not be very difficult to convince a T-Mobile associate that the hacker is actually the account holder, and then solicit the employee’s help in taking over the account entirely.

T-Mobile has not answered some key questions about the T-Mobile data breach, such as the specific number of customers who were affected and whether it was a breach of its customer website or another online source. While the company should be applauded for a rapid response to discovering the T-Mobile data breach, there is other pertinent information that the public and security experts alike could benefit from knowing.

Many of the customers have already received a text message notification about the T-Mobile data breach, which is another possible cause for concern. Users have to be able to discern between genuine communications from the company and phishing attempts by hackers who are posing as T-Mobile representatives. Any message that asks you to confirm your information, especially sensitive things like your password or PIN, is suspicious and the company has said it will never contact its customers for that kind of data.

This is true of most companies, whether there has been a data breach or not. Phishing attacks work because the victim thinks they are talking to someone from the business. Instead, it is a cleverly disguised copy of a company communication. In any event, there is never a reason to verify your identifying information for someone who contacts you, no matter what form the communication takes. Ignore the message and go directly to your account online in order to verify that everything is okay.

Contact the Identity Theft Resource Center for toll-free, no-cost assistance at 888.400.5530. 


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This website was supported in part by grant number 15POVC-21-GK-01092-NONF and 15POVC-22-GK-01803-NONF, awarded by the Office for Victims of Crime, Office of Justice Programs, U.S. Department of Justice. The opinions, findings, and conclusions or recommendations expressed in this product are those of the contributors and do not necessarily represent the official position or policies of the U.S. Department of Justice. View more about our copyright info here.

  • Victim Help Center
  • Solutions
    • Prevent Identity Theft

      Protect your identity from theft and misuse.

    • Recover My Identity

      Get direct assistance, a custom remediation plan, and resources if you’re a victim.

    • Protect My Business

      Explore our business service offerings today.

    • Breach Alert

      Get information on the latest data compromises.

    • Additional Support

      Vulnerable populations can get additional support to help protect their identity.

  • Resources
    • Insights

      Stay up-to-date on the latest news and happenings from the ITRC.

    • Newsletter

      Stay up-to-date on the latest news and happenings from the ITRC.

    • Reports

      Explore independent surveys and studies from the ITRC.

    • Podcasts

      Hear or read the latest in data security and privacy, as well as identity compromise and crime.

    • Events

      Explore upcoming events involving the ITRC.

    • Newsroom

      Check out the ITRC’s hub for journalists and policy makers.

  • About the ITRC
  • Contact


  • Call Now 888.400.5530