For Anon on LB asking about how cell phone's track towers and pings.

Here's apicture and article.

Basically - your phone is always sending a signal to "a" tower. Those towers log all the signals. That data is available to the cell phone companies and can be subpoena'd by law enforcement.

However, what is being used is tracking data from applications you have loaded on your device.

Read this article on the archive link to avoid the paywall.

https://www.nytimes.com/interactive/2018/12/10/business/location-data-privacy-apps.html (paywalled)

An app on the device gathered her location information, which was then sold without her knowledge. It recorded her whereabouts as often as every two seconds, according to a database of more than a million phones in the New York area that was reviewed by The New York Times. While Ms. Magrin’s identity was not disclosed in those records, The Times was able to easily connect her to that dot.

https://archive.ph/axL3e

At least 75 companies receive anonymous, precise location data from apps whose users enable location services to get local news and weather or other information, The Times found. Several of those businesses claim to track up to 200 million mobile devices in the United States — about half those in use last year. The database reviewed by The Times — a sample of information gathered in 2017 and held by one company — reveals people’s travels in startling detail, accurate to within a few yards and in some cases updated more than 14,000 times a day.