nytimes August 18, 2021 8:00pm T-Mobile Says Hack Exposed Personal Data of 40 Million People #cyberattacksandhackers #wirelesscommunications #computersecurity #tmobileusinc #news T-Mobile Says Hack Exposed Personal Data of 40 Million People The company said that stolen files included the personal information of 7.8 million current customers and 40 million people who had applied for credit.