T-Mobile confirms SIM swapping attacks led to breach


T-Mobile has confirmed a data breach that was caused in part by SIM swapping attacks, according to a statement from the company.

The T-Mo Report, a blog tracking T-Mobile, obtained internal reports showing that some data was leaked from a subset of customers.

Some individuals had their customer proprietary network information (CPNI) leaked, which includes information about a customer’s plan, the number of lines, the phone numbers, the billing account, and more. Others had their SIMs swapped.

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Source: ZDNet