If you take your phone between even just your home and work —doxxed locations— it is trivial to associate it with your true-name identity even if all of the hardware and services are perfectly anonymous. Even journalists have managed these kind of investigations. "Anonymized" location data is unfortunely not anonymous — it *can never* be anonymous. And yet it is sold like any other product.

Your phone's movements through physical space are unique. Even if you live in a building of 400 people, the movements of 399 of them are not going to match the tower records of your phone's movements. Even if you work in the same office. People's geographic movements are unique—and identifying.