T-Mobile, one of the world's largest telecom operators, has begun distributing $350 million in class-action settlement payouts to millions of customers affected by a major 2021 data breach. The payments, managed by the settlement administrator, are now underway and will continue over the coming weeks. The 2021 cyberattack exposed the personal data of around 76 million U.S. customers, including names, addresses, and Social Security numbers.