Making Calls

[HLing]

I finally got my Pine Phone UBPorts Edition.  I received mine on the 25th of June and have done a little bit of searching and researching.  It's a bit embarrassing to say, but my friends and family have been looking forward to this new phone because my previous phones were dropping calls (Nokia N9, through no fault of its own, but due to T-mobil updating its frequencies)  or cutting off after 10 secs.. (Kingrow K1 the e-ink phone)..Am beginning to think that it's my stupid Karma with phones.  Even with the stable version of Postmarket OS (6/28/20) loaded, i  am unable to speak or hear the phone call i make.  my screen shows 4G, the phone I dial rings, but that is it.  I know the sound on this phone works.  what am I doing wrong?

According to this issue: No 4G Calling, forcing the SIM card to use 2G or 3G will now allow calls to work.

Thank you, Adjivas for your reply.  I have since looked to Mobian. I have T Mobile in the USA. My e-ink phone K1 was only able to use the 2G/3G network (it was that phone's limitation with GSM) , and is a nightmare.  With Mobian on my pine phone it shows right away 4G signal. I am able to not only call the number, but also speak on the phone. (up to this point, with other OSs I could ring the phone, but not have any idea of whether anyone had picked up, much less to speak and have a conversation)