T-Mobile

T-mobile company suffered a significant data breach in a cyber attack in December 2021.

The customers fell prey to the attacker and suffered SIM swapping attacks and exposed personal information like personal plan information, billing account name, phone and account number, and others.

Around 50 million customers' data was compromised in the breach.

Source: https://www.theverge.com/2021/12/28/22857619/t-mobile-cyberattack-data-breach-december-2021-cpni-sim-swap

"id": "TMO154319322",
"linkid": "t-mobile",
"type": "Breach",
"date": "12/2021",
"severity": "90",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"