CPNI is highly sensitive telecommunications data that reveals your communication patterns and personal relationships; federal law (47 U.S.C. § 222) specifically restricts how carriers may use this data and requires them to obtain your approval before using it for marketing beyond your existing service.
T-Mobile collects extensive personal data including your real-time location, call and text metadata, device identifiers, financial information, and inferred behavioral profiles, and shares this data with advertising partners and affiliated companies for targeted marketing purposes. This means your daily movements, communication patterns, and financial behavior may be used to build a commercial profile about you without your active knowledge. You can opt out of data sharing for advertising purposes and submit data access or deletion requests by visiting t-mobile.com/privacy-center or calling 1-800-937-8997.