Frustration with development pace

[daniel]

Often with a fresh OS, the first 2 - 4 calls will have no ring tone and/or no audio, but after a few
attempts and checking the sound settings, it works after that.

Uhmmm that is interesting
I got a google fi sim and it worked out of the box.
I called my iPhone and I could hear on my PP but not on the iPhone.

I followed your advice and in settings, input sound was set at headset and moving it to the internal microphone fix it. Sadly after the phone call, it went automatically to the headset again.