According to Washington's Attorney General, T-Mobile knew its security practices were inadequate even before the 2021 security breach.

Washington state's attorney general says the company had years to fix vulnerabilities. T-Mobile says it's "fundamentally transformed" its approach to cybersecurity.

Read More A 2021 T-Mobile data leak exposed millions of customer's dataWashington State is now suing the telecoms giant The

Washington state has sued T-Mobile over failing to secure the sensitive personal information of over 2 million Washington residents in a 2021 data breach.

The filing asserts that T-Mobile failed to address certain security vulnerabilities that the company was aware of “for years,” and did not properly notify more than two millio

Washington Attorney General Bob Ferguson filed a consumer protection lawsuit against T-Mobile on Monday, claiming that the Bellevue, Wash.-based wireless carrier failed to adequately secure sensitive personal information of more than 2 million state residents.