[kop316]

That's my assumption as well, I was just curious. Their latest post indicates that they are wokring on VoLTE:

https://www.pine64.org/2019/12/05/december-update-thank-you-...

[Avamander]

Maybe they want to support it so that carriers could support it?

[kop316]

I assume they want to support it, as well as any other carrier feature. I just have no knowledge on how difficult it is, nor in what state it is in now.