Hi Floor,
Have you made any progress in figuring out what is wrong?
I’m wondering wat will be the results of the test @Martin_Anderseck suggested.
that will give a good indication if its a problem with your phone or provider.
you already told that you tried your sim in a different phone (your previous one). if a different sim does give the same result in your Fairphone than it is more clear where the problem is.
or your sim in a other Fairphone 5.
maybe ther is Fairphone Angel close by how can make a FP5 available to help you with this swapping over over test.
the phone was already sent for repair twice, you posted.
wat was the answers of the repair center? (no problem found, i suppose)
Did they do a factory reset?
ore maybe the network reset i posted here?
that’s a way to rule out if it is a software problem with your phone.
be aware that if you used a backup to bring back your phone after you got it back. its possible the backup dit bring back the software isu. so that will not completely rule out its a software isu.
this is just my trying to rule out some possible sources of the problem, to hopefully get to the point where it dit goes wrong.
Tom