I've just checked my phone, I am where it says I am.
That would not be thanks to GPS, not unless you're in the middle of the Australian outback or the Sahara desert. Both big players on the mobile phone OS market rely on non-GPS data to get your location. Wi-Fi access points are currently the most useful data points for urban areas, and mobile phone networks are a common source for less densely populated zones (possibly because Wi-Fi access points and mobile phone towers are not allegedly zooming through space).
https://en.wikipedia.org/wiki/Wi-Fi_positioning_system
https://en.wikipedia.org/wiki/Hybrid_positioning_system
And, shockingly enough, if you check your phone somewhere that doesn't rely on WPS or mobile network towers, your location data becomes quite inaccurate.
So either:
There's another global conspiracy by people who pretended they launched GPS satellites and other people pretending that GPS works by satellites, all to keep this very important secret that the earth is actually flat safe, because obviously it's very important that this truth is kept from the general public.
Or...GPS works exactly how it's stated it works, because we live on a globe.
Third option: You're not as tech-literate as you think you are and you fallaciously assume that GPS data is the only dataset used in mobile phone location tracking. You're attributing the efficacy of big data and very recent developments in fingerprinting to a rather simple system that's been conceived of 40 years ago. Round or flat, that ain't how it works.
You are confused between the mobile phone companies establishing where a mobile is and the user of a phone establishing their location.
Please give details of phones that use anything other than GPS to show the user their location.
He's right on that mobile phones utilize
not only GPS for estimating the location they show to the user, this is generally referred to as "Assisted GPS" as far as I know.
However that fact
doesn't matter at all and is a pure strawmannery on Pete's part.
There are plenty of devices that rely
solely on GPS and don't even have cellular or WiFi connectivity built in to do otherwise.
And no, Pete, a gyroscope, accelerometer and magnetometer
can't be used to determine one's initial position. Those sensors can only help determine a
change of position, as someone already pointed out.
And no, those devices don't prompt you to enter coordinates every time you turn them on.