T-Mobile Says Over 40 Million Customer Records Affected in Hack

T-Mobile US Inc. said an investigation confirmed about 7.8 million current users had information stolen along with more than 40 million records from past or prospective customers who’d applied for credit in a cyberattack.

The stolen information included customers’ full names, dates of birth, social security numbers, and IDs such as drivers licenses, the Bellevue, Washington-based company said in a statement on Wednesday. The hack doesn’t appear to have included credit card details or other financial information, it said.

The company said earlier this week that it was investigating claims that a widescale data breach had exposed customer details to ...