T-Mobile says cyberattack impacted more customer data than initially thought

Data on millions of additional customers was also compromised, T-Mobile said.

T-Mobile revealed Friday that the personal data of more than 5 million additional customers was compromised in the recent cyber attack, bringing the total number of people impacted to over 50 million. The company revealed earlier this week that it was the victim of a "highly sophisticated cyberattack," and that the data of millions of current and prospective customers -- including names and social security numbers -- had been compromised. The company reiterated on Friday that it has no indication any of the stolen files include financial information or credit and debit card information. "We previously reported information from approximately 7.8 million current T-Mobile postpaid customer accounts that included first and last names, date of birth, SSN, and driver’s license/ID information was compromised," the company said Friday, adding that it also determined phone numbers and IMEI and IMSI information (identifier numbers associated with a mobile phone) were also compromised. "Additionally, we have since identified another 5.3 million current postpaid customer accounts that had one or more associated customer names, addresses, date of births, phone numbers, IMEIs and IMSIs illegally accessed." The company said the additional accounts, however, did not have any social security numbers or driver's license information compromised.