Mobile prepaid customers' personal data has been compromised

Joanna Estrada
November 22, 2019

"We promptly reported this to authorities".

The telecom giant T-Mobile announced on Thursday that it suffered a data breach in which hackers accessed personal information of its prepaid wireless customers.

The customer information accessed during the data breach is associated only to prepaid accounts according to the data breach notification published by T-Mobile.

T-Mobile said Thursday that hackers gained access to the personal information of some prepaid wireless customers, including their names, phone numbers and account information. The only data accessed by a third-party was information associated with the prepaid service account, which includes names, billing addresses, phone numbers, accounts numbers, rate plan and features, as well as whether or not it has an worldwide calling feature attached to it.

"Rate plan and features of your voice calling service are "customer proprietary network information" ("CPNI") under FCC rules, which require we provide you notice of this incident".

The telco said it notified law enforcement of the incident, and is now reaching out to customers. T-Mobile said in its statement. In that case, however, T-Mobile said that encrypted passwords had also been exposed.

T-Mobile is in the process of notifying all customers that've been affected by this data breach.

Update, 6 p.m.: Adds T-Mobile comment.

UPDATE: When contacted for more information about the incident, T-Mobile told us that a "very small single digit percentage" of customers were affected.

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