• Mobile telecom providers U.S. Cellular, Mint Mobile and T-Mobile have all been breached in 2021. In fact, T-Mobile has been breached twice in 2021, and once in December 2020.
  • If your mobile phone account is breached, you should freeze your credit, change your passwords and PIN numbers, and use multi-factor authentication (MFA or 2FA) using an app, not text messages, to protect yourself when available.
  • You should also follow the steps in any data breach notification letter you receive or read in a public notice.
  • Keep an eye out for phishing emails, closely monitor your financial accounts and contact your Department of Motor Vehicles (DMV) if your license number is exposed in the breach.
  • If you believe your phone account is breached, or want to learn more, contact the Identity Theft Resource Center. Call toll-free (888.400.5530) or live-chat on the company website

The Rise in Mobile Data Breaches

The Identity Theft Resource Center (ITRC) has seen mobile data breaches rise, particularly in 2021. Customers of mobile phone companies that have not reported a breach also want to know what to do if their phone account information is exposed.

In January, U.S. Cellular suffered a data breach after hackers were able to scam employees to gain access to one retail store’s computer. In July, some Mint Mobile customers had phone numbers ported, leading to data being accessed. One month later, T-Mobile was breached when bad actors compromised their systems, impacting millions of documents. In fact, it is the second T-Mobile data breach in 2021 and the third since December 2020. Right now, Bleeping Computer reports that well-known threat actor ShinyHunters claims to be selling a database containing the personal information of 70 million AT&T customers. However, AT&T says they did not suffer a data breach.

Telecommunications companies continue to be targeted by identity criminals due to the importance of mobile devices in our daily lives. The rise in mobile data breaches means everyone needs to be prepared if they are impacted by a compromise. There are steps you can take to protect your information and if your phone account is breached.

What You Should do to Protect Yourself if Your Phone Account is Breached

  • Freeze your credit. Monitoring your credit is informative because it alerts you to changes on your credit reports that may need further investigation if your phone account is breached. However, it does not offer protection. While it tells you what happened, it does not stop anything from happening. A credit freeze does. Freezing your credit is free, easy and does not impact your credit.
  • Change your mobile phone account password and PIN numbers. Also, change the passwords of other accounts with the same password or PINs as the breached account. You do not want the same passwords or PINs on more than one account. Cybercriminals want you to do that because they can commit credential stuffing attacks. The ITRC recommends you switch to a unique 12+ character passphrase because they are harder for criminals to crack. You can also use a password manager to generate and keep track of your credentials.
  • Use multi-factor authentication (MFA or 2FA) on your accounts. MFA and 2FA provide an added layer of security, making it harder for hackers to gain access if your phone account is breached. Also, if possible, use an authentication app rather than having a code sent by text to your phone because the text messages can be spoofed and intercepted in a SIM swapping scheme. Authentication apps are available for free from Microsoft, Google and other software providers.
  • FOR BUSINESSES: Don’t lose control over the information you don’t have. Don’t collect more information than you need. Don’t keep the sensitive information longer than you need to complete the transaction. Keep what data you do collect and maintain safe and secure by encrypting it. Finally, make sure you offer MFA or 2FA for your customers’ and prospects’ protection when logging into their accounts.

Next Steps to Take if Your Phone Account is Breached

  • Watch for data breach notification letters. It is easy to ignore a breach notification. However, there are usually important steps in the notices, like how to activate free identity protection services. Follow the advice offered by the impacted company.
  • Be on the lookout for phishing emails. Identity criminals may look to exploit the data breach to get you to click on a malicious link or share sensitive information.
  • Closely monitor your financial accounts (credit cards, banking, utilities, etc.) If you see anything out of the ordinary, it may be a sign of fraudulent activity.
  • Contact the Department of Motor Vehicles (DMV) if your license is impacted. Notify the DMV in your state that your information may have been exposed. See if you can place an alert on your license number and check your driving record.

Contact the ITRC

Data breaches are inevitable. Consumers can do everything right and still have their phone account breached. If you believe your phone account is breached or want to learn more, contact the ITRC. You can speak with an expert advisor by phone (888.400.5530) or live-chat on the company website Advisors will answer any question you may have and help you through the resolution process.

The ITRC does not want anyone to panic. While it can be frightening if your phone account is breached, you will be able to work through any misuse of your information if you have a plan.

  • T-Mobile recently suffered its third data breach since December of 2020. The T-Mobile data compromise has affected over 40 million people and led to information like Social Security numbers (SSNs) and driver’s license information being hacked.  
  • Cybersecurity researchers claim the T-Mobile data compromise may impact as many as 100 million current, past and prospective customers. 
  • To protect yourself from the T-Mobile data compromise, consider freezing your credit, changing your passwords and PIN numbers to long and unique passphrases, using multi-factor authentication and not ignoring breach notices.  
  • To learn about recent data breaches, like the T-Mobile data compromise, consumers and businesses should visit the Identity Theft Resource Center’s (ITRC’s) data breach tracking tool, notified
  • For more information on the T-Mobile data compromise, or if someone believes they are the victim of identity theft, consumers can contact the ITRC toll-free at 888.400.5530 or via live-chat on the company website  

Facts Are Stubborn, But Statistics Are Pliable 

Welcome to the Identity Theft Resource Center’s (ITRC)Weekly Breach Breakdownfor August 20, 2021. Our podcast is possible thanks to support from Abine and Experian. Each week we look at the most recent events and trends related to data security and privacy. This week, we talk about the T-Mobile data compromise, which is one of the most significant data breaches so far this year. We also talk about what you should do in response, even if you are not impacted by it. 

Mark Twain once wrote that “Facts are stubborn things, but statistics are pliable.” Apply that same principle to data breaches and you get the natural pattern that emerges when personal information is suddenly stolen or exposed by a cybercriminal. The typical response goes something like this:  

  • “We don’t have any evidence there has been a breach, but we will investigate.” 
  • Followed by “We have investigated and found that a small number of customers information has been compromised, but we do not believe any sensitive or personal data is at risk.” 
  • That statement is often followed by an update that sounds like this: “We have now determined that more than X million of our valued customers are directly impacted by unauthorized access by cybercriminals of our systems, and the data involved does include Social Security numbers (SSNs) and other personal information.”  

T-Mobile Suffers its Second Data Breach Since February 2021 

We don’t “name and shame” companies at the ITRC. Cyberattacks and data breaches are an unfortunate consequence of our digital society. It’s only logical that the more you investigate, the more you know, meaning numbers change. We have laws, regulations and courts to handle the blame game. We do, though, use anecdotes to help educate consumers and businesses on how to protect themselves.  

What Happened? 

This week, T-Mobile finds itself in the unenviable position of providing a teaching moment thanks to its third data breach since December 2020 and its second data breach since February 2021. The nation’s third-largest mobile telecom provider did not know it had been breached until a cybercriminal posted customer information stolen from T-Mobile in an identity marketplace used by identity thieves. 

Cybersecurity researchers claim as many as 100 million current, past and prospective customers may be impacted by the T-Mobile data compromise. T-Mobile has confirmed the personal information of 47 million people has been compromised, including customers’ first and last names, dates of birth, SSNs and driver’s license/identity information in some instances. 

T-Mobile customers can visit the carrier’s website to learn more about the company’s actions to help victims of the breach. 

What Should You Do to Protect Yourself After the T-Mobile Data Compromise? 

What should you do if you are a T-Mobile customer? Actually, it doesn’t matter if you are a T-Mobile customer or not. Here are some actions that everyone should take to help protect their personal information today and after a data breach:  

  1. Do not ignore data breach notices. There are a lot of them. However, there are usually important action steps in the notices, like how to activate free identity protection services. 
  1. Freeze your creditCredit monitoring is helpful, but it offers no protection. It tells you what happened, but it doesn’t stop anything from happening. To protect yourself, freeze your credit. It’s free, easy and doesn’t impact your credit. 
  1. Change your passwords and PIN numbers to make sure you do not use the same passwords or PINs on more than one account. Make sure the password is long, at least 12 characters, and is something you can remember. You can also use a password manager to generate and keep track of your credentials. Cybercriminals love it when we reuse passwords on more than one account. 
  1. Use multi-factor authentication (MFA or 2FA) on all your accounts that offer it. If possible, use an authentication app rather than have a code sent by text to your phone. Authentication apps are available for free from Microsoft, Google and other software providers. 
  1. If you are a business, make sure you don’t collect more personal information than you need. Don’t keep it longer than you need to complete the transaction. Also, keep what data you do collect and maintain safe and secure by encrypting it. Make sure you offer MFA for your customers’ and prospects’ protection, too. 

Contact the ITRC 

You can always call us at the ITRC if you have questions about what you should do if you receive a data breach notice or hear about a breach in the media, like the T-Mobile data compromise. Just visit, where you’ll find helpful tips. You can speak with an expert advisor on the phone (888.400.5530), chat live on the web or exchange emails during our normal business hours (6 a.m.-5 p.m. PST).  

Thanks again to Experian and Abine for supporting the ITRC and this podcast. We’ll be back next week with another episode of the Weekly Breach Breakdown

CashApp scams have seen an uptick since COVID-19 began impacting the United States. In April, we wrote about scammers out in full force trying to get consumers to fall for CashApp scams by clicking on fraudulent and malicious links that could steal people’s money and identity, taking advantage of the economic hardships. Now, the Identity Theft Resource Center (ITRC) is receiving multiple calls and live-chats about a twist on the CashApp scam: a CashApp customer support scam.

Who Is Targeted

CashApp users

What It Is

A CashApp customer support scam where scammers act as CashApp customer support on a hotline to gain access to users CashApp accounts or ask users to download software to allow remote access to their mobile device.

What They Are After

Scammers are after money and personal information using a fake customer support hotline. In one CashApp scam case reported to the ITRC, a scammer stole all of the victim’s money and changed their username and password. In another case, a scammer was able to get a hold of the victim’s bank account number and access the victim’s bank account.

How You Can Avoid It

  • As of right now, CashApp only offers customer service via email or through the app, not by telephone. Reach out to customer support directly through the company’s website or app.
  • Never give out personal information over the phone if you do not know who is on the other end.
  • Do not download software to allow third parties to have access to any of your mobile devices.
  • Only use CashApp to transfer money to people you know.
  • Add additional security measures, including multi-factor authentication.

If you think you may have fallen victim to a CashApp customer support scam, you can call the ITRC toll-free at 888.400.5530. You can also live-chat with an expert advisor on the company website.

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