@kdh: Please don’t draw conclusions about the Fairphone in general just because of your personal frustrating experience with your Fairphone and denying others their own experiences.
I for one didn’t think GPS worked on the Fairphone at all when I first got it but when I tried the first fix I could find on the forum (here) it suddenly worked.
It wasn’t perfect yet but then I tried more and more of the fixes provided on the forum (EDIT: I just gathered them here) and now I usually have a TTFF of 2 seconds and an error of less than 4 meters.
Often I even keep staring at my screen while walking around and collecting data for free location databases and my position isn’t wrong even once.
And it doesn’t just work while walking, as soon as I have a fix (wich of course takes longer if I’m not out in the open) GPS works perfectly in cars and trams as well. Only when I’m traveling by train through the Alps (lots of long tunnels) and changing country sometimes I can’t get refixed again until I leave the train. But then again if you are in a train, you don’t really need navigation, so …
EDIT: And also please avoid posting the same things multiple times on the forum. I deleted your duplicate post here.