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