I am running mobian-pinphone-phosh-20210202.img
Today I received a system update through the phone GUI and a calling app update. Huge improvement on call quality. 
I have postmarketOS edition PinePhone.
	
	
	
	
	
 
 
	
	
		No, bluetooth does not work with calls, making a call though contacts does not work either, you have to actually input the phone number.  You can text from the contacts button though.
	
	
	
	
	
 
 
	
	
		gnome-call seems to be broken since last update ...
can't place calls from history or cmdline using gnome-call -l
but as stated, it works from dialpad, it also works from xdg-open (and from the contacts app)
it is a minor issue (it seems to be a memory allocation failure so it should already be fixed by now)
	
	
	
	
	
 
 
	
	
		I confirm a problem.
I can't call back from the top menu when I see a "missed call". When I've try to open the Call application a red message said "... : No voice-capable modem".
When I use Contact to make a call, all is working.