https://www.techdirt.com/articles/20190506/07291442142/all-four-major-wireless-carriers-hit-with-lawsuits-over-sharing-selling-location-data.shtml

We've noted repeatedly that if you're upset about Facebook's privacy scandals, you should be equally concerned about the wireless industry's ongoing location data scandals. Not only were the major carriers caught selling your location data to any nitwit with a checkbook, they were even found to be selling your E-911 location data, which provides even more granular detail about your data than GPS provides. This data was then found to have been widely abused from everybody from law enforcement to randos pretending to be law enforcement.

Throughout all this, the Ajit Pai FCC has done absolutely nothing to seriously police the problem. Meaning that while carriers have promised to stop collecting and selling this data, nobody has bothered to force carriers to actually confirm this. Given telecom's history when it comes to consumer privacy, somebody might just want to double check their math (and ask what happened to all that data already collected and sold over the last decade).