The state of Washington has filed a lawsuit against T-Mobile, alleging that the company neglected to secure the personal data of over 79 million customers prior to a significant data breach in August 2021. Washington Attorney General Bob Ferguson claims that T-Mobile was aware of cybersecurity vulnerabilities for years but failed to take adequate measures to address them. The suit seeks financial damages and demands improvements in T-Mobile's cybersecurity protocols. The breach resulted in the exposure of sensitive customer information, including Social Security numbers and driver’s license details, with some data appearing on cybercriminal forums.