Cookies and Tracking Technologies

We use standard technologies like browser cookies, mobile advertising IDs, web beacons, and third-party analytics tools to collect behavioral and operational data when you interact with us through our websites and apps, and when we communicate with you by email or text message.


A cookie is a small data file that a website sends to and stores on your browser to allow the site to recognize your browser or store information and/or settings. We may use “persistent” and/or “session” cookies. Persistent cookies are stored on your computer and used for various purposes by your browser on subsequent website visits (such as to avoid having to reenter your log-on credentials). Session cookies are temporarily held in your device’s memory and erased after you end a browser session or shut off your device.


Mobile advertising IDs, or sometimes called “MAIDs”, are random sequences of alphanumeric characters assigned to uniquely identify a mobile device. Mobile advertising IDs can include AdID, which is used on Android devices, and Identifier for Advertisers (IDFA), which is used on Apple devices. These mobile advertising IDs are collected, shared, and used by T‑Mobile and our third-party advertising networks to serve targeted ads and attribute actions taken by you in connection with ads. You can access and reset your mobile advertising ID or limit the use of mobile advertising IDs for targeted ads through the settings on your mobile device’s operating system.


A Web beacon (sometimes called transparent or single pixel “GIFs”) is an invisible digital object embedded in a webpage or email. Web beacons are typically used to monitor your interaction with the webpage or email. Web beacons can help us count visitors, determine whether emails are opened, monitor how long a webpage is viewed, and perform similar functions. Our webpages and emails may contain Web beacons from third parties, which help us compile aggregated statistics regarding the effectiveness of our ad campaigns and assess website operations.


Analytics tools allow us to measure and assess how users interact with our websites, apps, and digital communications. These services are typically provided by third parties with whom we contract—like Adobe and Google Analytics. These providers may use many of the same technologies discussed above (such as cookies and Web beacons) to collect data points associated with your visits to our websites and use of our apps.


Depending on your device, you may be able to obtain services (such as mapping or ride-sharing service) that use the location of your device. These services, referred to as location-based services (“LBS”), are generally provided by third parties in connection with apps or websites. Third-party LBS providers generally use your device operating system’s location capabilities, which can determine location independent of our communications network, to derive device location. It is important that you understand. the location capabilities and settings of your device and the privacy policies and terms under which third-party LBS are provided.


In some cases, T‑Mobile may directly offer you LBS or the opportunity to have a better targeted advertising experience. Where we do so, we will give you choices before we access precise location data to support the service or advertising. We may, however, estimate your general location without seeking specific consent (such as to infer what news or weather may be most relevant to you when browsing a website). T‑Mobile follows the CTIA’s Best Practices Guidelines for Location-Based Services, which are available here.

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