Chief executive John Legere said on Twitter that T-Mobile is “completely ending location aggregator work,” which will terminate in March.
This doesn't mean that your location data won't be available... it just won't be available for sale through them, and their aggregator. I'm sure that there are enough apps on your phone that will do it for you.

https://www.washingtonpost.com/techn...=.4f787f9342b4