@flohack I don't think that's the case: I'm not using Waydroid and the GPS behavior is more an hit-and-miss: yesterday I had a fix in the morning through the window with no problems, then in the afternoon I was outside and couldn't make it work. When back home, I unlocked the phone and noticed I left the app open: it fixed instantly, even if I was in a room with no direct sky view. The phone was never rebooted in the meantime.
Under "location" I see only "Using GPS", so I don't think it used my home Wifi to obtain the position (but I may be wrong).
This week end I'll be more time outside, so I'll try to reproduce it.

@lakotaubp Done!
The build is pretty solid atm. Only issue I could notice was the GPS not fixing every time I tried to use it. Not sure how to reproduce the issue, I'll keep an eye on it and if I find a pattern to reproduce it I'll file a bug on the gitlab repo issues tracker.

@lakotaubp Thank you a lot! This port is wonderful, it works almost everything!
It's my first Ubuntu Touch experience, so I'm not sure how to upgrade (will I receive an OTA upgrade or should I use the ubports-installer again?).
EDIT: Never mind, just received an OTA. This is WONDERFUL. I confirm call audio is working.

Besides the audio call problem, I found the fingerprint sensor not working (not a big deal). Everything else is working: GPS, Wifi, Bluetooth audio (tested with Fairphone Earbuds), tethering and so on.
All the 3 cameras are recognized in the browser and are working fine. Unfortunately the Ubuntu Touch Camera app doesn't support the double back camera and uses only the primary (i think it should be trivial to implement a dropdown showing all the cameras like in the browser at this point).

Also, I'd like to send a little donation, do you accept ko-fi, paypal or other means?

Thank you very much for your work!