European mobile operator openly sells user data

Ad Exchanger reports that the carrier's new T-Mobile App Insights program allows third-party marketers to buy

T-Mobile customer data, and it centers around a key piece of information the company has unique access to: what apps you use. Discuss

Customer data is anonymized and combined withdata of other people, so companies cannot buy the application history of a specific user, but this is still an unpleasant “red flag”. Moreover, the advertising phrase for this "feature" also raises concerns: “Applications speak louder than words.” Fortunately, this sale can be waived.

T-Mobile offers an app for Android and iOScalled "Magenta Marketing Platform Choices", which allows you to see which companies have customer data and opt out of it entirely.