T-Mobile will begin sharing your web browsing and mobile app data with advertisers starting April 26, 2021. T-Mobile is automatically enabling this for nearly everyone, but you can opt-out to prevent T-Mobile from selling this data to marketers.
This also applies to other T-Mobile-owned carriers, including Sprint and Metro by T-Mobile.
As The Wall Street Journal reports, a T-Mobile privacy policy update says that the company will begin sharing web browsing and mobile app usage data with advertisers. By tracking your mobile app usage and web browsing, T-Mobile can put you into a group known as an “audience segment.” Here’s how T-Mobile explains it:
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