It's worth pointing out that modern phones have at least a half dozen other means to determine your location. Not all methods require the phone to participate. Here's a few off the top.<p><pre><code> * CGI/CGI-TA/UTDOA via the cell network
* bluetooth discovery
* wifi AP's
* audio via both mic and speaker, possibly ultrasonic: listen and emit to other devices in environment
* NFC
* magnetic field
</code></pre>
If you don't like this, you should turn it off and keep it in a metal box.<p><a href="http://electronics.howstuffworks.com/bluetooth-surveillance2.htm" rel="nofollow">http://electronics.howstuffworks.com/bluetooth-surveillance2...</a><p><a href="http://www.skyhookwireless.com/about-skyhook" rel="nofollow">http://www.skyhookwireless.com/about-skyhook</a><p><a href="http://arstechnica.com/tech-policy/2015/11/beware-of-ads-that-use-inaudible-sound-to-link-your-phone-" rel="nofollow">http://arstechnica.com/tech-policy/2015/11/beware-of-ads-tha...</a>
tv-tablet-and-pc/<p><a href="http://newatlas.com/magnetic-anomaly-indoor-positioning/23253" rel="nofollow">http://newatlas.com/magnetic-anomaly-indoor-positioning/2325...</a>
GPS isn't possibly tracking mechanism because it works via passive reception of a satellite signal.<p>Wireless networking in mobile devices is a tracking mechanism. It works to an extent without help from GPS data. Even with GPS off, your device can know quite accurately where you are based on other environmental information.
I just read a part of the text, eventually started searching for the GPS keyword. couldn't find the connection between the title and the article other that the ad for a book thing.