SIM swapping (also known as SIM hijacking) makes it possible for attackers to take control of a target’s mobile phone number by tricking or bribing the carrier’s employees to reassign the numbers to attacker-controlled SIM cards. Ref https://www.bleepingcomputer.com/news/security/t-mobile-says-new-data-breach-caused-by-sim-swap-attacks/
T-Mobile says new data breach caused by SIM swap attacks
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