The 2021 T-Mobile data breach was a cybersecurity incident in which attackers gained unauthorized access to T-Mobile US networks and extracted sensitive customer information. Public disclosure began in mid-August 2021 after reports that T-Mobile data was being sold on a hacking forum, and T-Mobile later said the incident affected millions of current customers and tens of millions of former or prospective customers.
The 2021 T-Mobile data breach was a cybersecurity incident in which attackers gained unauthorized access to T-Mobile US networks and extracted sensitive customer information. Public disclosure began in mid-August 2021 after reports that T-Mobile data was being sold on a hacking forum, and T-Mobile later said the incident affected millions of current customers and tens of millions of former or prospective customers.
Source: Wikipedia "T-Mobile data breach" · CC BY-SA 4.0
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