The T-Mobile hacking incident continues to grow, and the latest update reveals people may be at risk and not even know it.

On Thursday T-Mobile revealed that hackers had breached Experian’s network and stolen T-Mobile’s data on over 15 million potential customers.

T-Mobile uses Experian to perform credit checks for those interested in financing phones or cell plans.

The latest update from the companies now confirms that the breach affects those who applied for credit as early as September 16th of this year, but goes back up to 2 years, from 2013-2015.

Which means anyone who applied for credit from T-Mobile in the last 2 years, whether they were approved or not, is at risk.

Experian said it is notifying those that may have been compromised by mail and will be offering 2 years of free credit monitoring, free fraud agents to speak with and more.

Anyone who applied for credit for T-Mobile can go here to sign-up for these services.

While the information stolen does not contain any banking information, it does contain personal information that hackers can use to steal someone’s identity.

Also, bear in mind that if you take Experian up on their offer to monitor your credit, you will have to give them more personal information- a scary thought since they have already been compromised.

Consumers who wish to seek other avenues of protection can sign up with a credit protection agency like Life Lock, with prices starting at $9.99 a month.

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