Call quality seems pretty good. I've not talked to a lot of people yet, but everyone that I talked seemed to come through clearly. My sister did mention that there was a lot of feedback wehen I had her on speakerphone. Once I got her off speaker, she said everything was good.
One problem that I have noticed is that the calls app does not associate the numbers that I have called with the contacts. All I see is the numbers that I have called.
Texting does not have this issue.
#pinephone #mobian