Yet even in Switzerland, there are companies having access to cell provider data and therefore location data "behind the carrier firewall". https://techcrunch.

Yet even in Switzerland, there are companies having access to cell provider data and therefore location data "behind the carrier firewall". https://techcrunch.com/2017/09/07/teralytics-wants-to-tap-telcos-big-data-to-help-cities-get-smarter-about-uber-and-lyft/ https://techcrunch.com/2017/09/07/teralytics-wants-to-tap-te... "Polzer says it’s using a variety of proprietary techniques to handle the data in a way that preserves user privacy — although he won’t go into too much detail, claiming commercial sensitivity" Folks also call this "Security by obscurity".