T-Mobile, the third-largest carrier in the United States, that has recently completed a $26 billion merger with Sprint, announced that it had experienced a second data breach in December, 2020. The security breach may have revealed call-related information and phone numbers of some of its customers. According to the company, it recently discovered illegal access to some customer account information, including data that T-Mobile collects on its customers when considering the provision of mobile services. However, the company reported that the information affected by the violation did not include the customer’s account names, physical or email addresses, financial data, credit card information, social security numbers, tax IDs, passwords or PINs. The information accessed by hackers is known as Customer Proprietary Network Information (CPNI). This data can include call records, such as when the call was made, how long it lasted, the caller’s phone number and destination phone numbers,…
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