2018 — T-Mobile US: T-Mobile initially said that personal data was…

2018 2.0M records affected

Technical writeup

Aug 2018. T-Mobile initially said that personal data was stolen, but no passwords or financial info. They later admitted that encrypted passwords had been stolen.

Root cause

Hacked

References

https://motherboard.vice.com/en_us/article/a3qpk5/t-mobile-hack-data-breach-api-customer-data