PINE64

I own a UBPort CE PinePhone and using 2 sd card one with Mobian and one with PostmarketOS, both same issue.
With 4G activated i can't make or receive any calls but mobile data works fine. I can send SMS, but to receive them it take very long time or i have to reboot the phone.
3G is working fine instead.
My carrier is Vodafone.

Did you set up the APN correctly?
Or otherwise, do you have access to a SIM card of a different carrier?

I remember that while on SoftBank I couldn't get the USIM card to work no matter what, and the people at the local SoftBank store then told me that they only support iOS and Android (and garake (flip phones), but these run on a degoogled Android base).
Then I subscribed to Rakuten Mobile (and I'll change my old USIM to them too soon), and all of the sudden I could use mobile data and calls on my Pinephone (and on top of that, it's not restricted to the specific phone model that's registered for that USIM card only).

Yes APN set up correctly since it works fine under 3G, both Calls/SMS and mobile data.
Sadly can't test any other carrier at the moment.