What to do if you're concerned about the T-Mobile data breach - The Washington Post

This week, wireless carrier T-Mobile confirmed reports of a major data breach in which hackers obtained personal information belonging to more than 40 million past, present and potential customers.

And in a sign that the extent of the data breach is more severe than previously expected, T-Mobile on Friday confirmed that personal data belonging to an additional 5.3 million customers was obtained in the hack.