I’ve managed to get the microG settings Self-Check to the level where some boxes are still unticked: ‘System spoofs signature’, ‘Play Services (GmsCore) has correct signature’, and ‘Play Store (Phonesky) has correct signature’. Does this matter at all? I’ll try to see if it works, the moment I have a more accurate location reading (outside).
Edit: Apparently Xposed (or Needle for that matter) is required to enable signature spoofing. All the warnings in it put me off a bit. Will it work without it? What change is there I screw up my Fairphone Open OS image?
Edit2: No luck this time, maybe Xposed might make things better.
Edit3: @Roboe I see you used Needle for enabling signature spoofing. I’ll probably give that a try. It might benefit from a nice tutorial though 
Google calendar without google play service
Edit4: Success!! Using the Needle solution I was able to spoof my signature, which finally did the trick. I’ve managed to check all the marks of the microG Self-Check screen.
I guess my eagerness to play Pokémon Go on my Open Source Fairphone 2 drove me to properly configure all the Google Services mocking/stubbing/spoofing solutions.
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