Yea, I'm thinking of ditching my sim card or living mostly in airplane mode with wifi. I don't want to be part of a system where even the cell phone carriers are selling my real time location.

You do realize location tracking via wifi broadcasts (not even AP association!) is a thing, right?

http://digitalmortar.com/overview-in-store-tracking-technolo...

You'll be part of the system as long as you have a phone.

(...and as long as you have a face, if projections are to be believed.)

Yea, it's pretty awful. Beyond that you also have to trust that the phone is doing what it says (not broadcasting wifi beacons when wifi is off). A faraday caged messenger bag has been on my list for stuff to make. I've also been trying to think of an acceptable mask to wear in public and I saw someone on my train home with a mirrored face visor. [1] No time soon, but good to keep in mind. License plates are pretty bad too, photography in public is legal, so anyone could set up a dense enough camera network and track you everywhere you go via license plate. The most obvious case would be governments processing the video / images from cameras on traffic lights.

1. https://www.amazon.com/_/dp/B073WB4KSF