LANSING, Mich. (Michigan News Source) – Wireless carrier T-Mobile announced an unidentified malicious intruder breached its network in late November and stole data on 37 million customers.

The data breach included addresses, phone numbers and dates of birth, according to the company.

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T-Mobile said in a filing with the U.S. Securities and Exchange Commission that the breach was discovered Jan. 5.

It said as of now the breach did not include passwords or PINs, bank account, or credit card information, Social Security numbers or other government IDs.

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T-Mobile said it has notified law enforcement and federal agencies.