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politician didn't say having a smartphone was mandatory, nor did marssaxman say having a tesla was mandatory. politician is merely guessing that marssaxman migh
by jamescostian 9y ago
politician didn't say having a smartphone was mandatory, nor did marssaxman say having a tesla was mandatory. politician is merely guessing that marssaxman might have a cellphone tracking their location, so having tesla track their location wouldn't be much worse
- jacquesm 9y agoHe wrote 'smartphone', not 'cellphone' and presumably knows the difference. With a cellphone the GPS in the phone can - and will - track you six ways from Sunday unless you are very very careful, with a cellphone the carrier does not so much 'track your location' as that they record field strength to determine which tower you connect to as well as to manage the handover. To turn that into location data is absolutely possible but not nearly as accurate as GPS, especially not when you stop moving for a while.
- jamescostian 9y agoI apologize for writing "cellphone" instead of specifically "smartphone" in my comment - I meant to say the latter. Nevertheless, what you describe sounds a lot like a "smartphone with location services off" (assuming you trust the smartphone)
- jacquesm 9y agoAccelerometer can do some pretty impressive dead reckoning once you have a fix. Microphones can be used for triangulation based on multiple fixes on the same sound sources (used for shot detection, but it works the other way around too). http://www.popsci.com/technology/article/2013-04/smartphone-app-locates-source-gunfire http://www.popsci.com/technology/article/2013-04/smartphone-... Smartphones can track you in a large number of ways, and you really should not trust them (esp. not if they are Android).