Unsatisfactory GPS reception on PinePhone?

[calinb]

However, it's usually pretty far off the actual position (100 to 200m), and since GPS actually doesn't see satellites, I guess that's location via the cell towers.

Questions:

- Am I missing anything?
- In step 4, should I enable agps-msb, gps-nmea, and gps-raw via separate calls to mmcli, in that order?
- Has anyone found a reproducible procedure for reliably getting GPS location?
- Could there be a hardware failure? Has anyone experienced an actual broken GPS receiver?
- What kind of performance can we expect at best from the particular GPS receiver that's built into the modem?

Kind regards,
Alex

Yeah--your location is derived with 3gpp rather than sats. Most of the time I think 3gpp is based entirely on cell towers and perhaps service providers (including Internet providers via wifi), but theoretically, I think it could be other radio sources too, including the position of actual access point radios. 3gpp has put my position as much as 500 miles off from where I was located here in rural Idaho! At home, it puts me only about 2 or three miles away.

I only once got a sat position and, even then, the sat SNRs were very weak. I plan to get out my tiny screwdriver set and check the GPS antenna connection. Martijn Braam shows us how to open up the phone:
https://www.youtube.com/watch?v=5GbMoZ_zuZs

and megous took some hi-res photos:
https://xnux.eu/devices/photos/pp-1.2.html

I suspect the GPS/GNSS cable may be the one in the lower right here:
https://xnux.eu/devices/photos/pp-1.2/mpv-shot0002.jpg

Hmm...what's that open socket to its immediate left? Might the assembler have plugged the cable into the wrong socket? At any rate, my GPS has never been useful.