mtbikernate
Well-Known Member
it depends. when available and when you have things set to "use precise location" (which is sometimes a setting within a specific app, but can also be a global setting) it absolutely will primarily use GPS satellites. the phone will augment this with other tech (cell towers, static wifi signals, etc), which can speed signal acquisition and also deal with reflected sat signals in cities. Garmins process multipath better than most cell phone apps do, but those apps will also tap into those other signals to deal with multipath, so phones don't necessarily need such robust signal processing the way standalone GPS receivers do.A cellphone on the other hand primarily depends on the cell signal and does.not try to ping off of a satellite as much. Depending on the city it can also cause issues when you have poor signal for some odd reason(this happens a lot in Denver and Colorado Springs).
I live in a part of the east that has pretty bad cellular reception, so I am frequently using my phone in gps-only mode. And I have to fuss with location services permissions way too often on my current phone. Damn thing revokes permissions from apps if I don't use them often enough. I have something like a dozen map apps of various sorts. Yesterday I was doing a hike, for example, and the app I was using for nav purposes had precise location permissions revoked since the last time I used it. So I had to go and change the setting. Pisses me the f*ck off.
early smartphones were different in how they handled this stuff. they definitely prioritized cell tower location. the earliest ones didn't have a gps chip in them at all. Newer phones basically use the same gps chips you can find in standalone gps receivers. The major differences are with antenna size (phones having a smaller gps antenna because more hardware is packed into a smaller space) and with the software that processes the raw data (your apps of choice). The raw data coming out of the gps chip on your phone is more or less the same as the raw data coming out of your Garmin. with the same ping rate. you can find phone apps that will give you just the raw gps data so you can see the difference between what the hardware is capable of and compare it with the heavily filtered result from the apps you use, but those don't tend to be the user-friendly ones that people like using. they're more for professional use.
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