Refer: https://www.pushspring.com/optout.html
T-Mobile has hidden the. DO NOT SELL Link and you have to opt-in to DO NOT SELL.
Use this link: https://www.t-mobile.com/dns?brand=Magenta&site=Sell_App&origin_url=www.t-mobile.com%2Fprivacy-center#
PushSpring develops and utilizes technology that allows for collection of personally identifiable information associated to end user devices via pseudonymous, resettable device advertising IDs on devices that support advertising IDs, to create aggregated interest and behavior-based targeting segments, to drive targeted advertising campaigns, and to perform analytics services for our customers.