Verizon will only support VoLTE within a few months.
Posts made by B2288
RE: VoLTE and 3G shutdowns
Is VoLTE support planned for UT anytime soon?
It was discussed on a Q&A a few weeks ago, and also on the Telegram Supergroup. We also have a thread about it on the forum here. The core developers are aware of the need, but support will probably not come soon.
Dobey mentions in the forum thread that getting to VoLTE will take significant work. Without meaning to put words in the mouth of the core development team, the chief priority of current development would seem to be getting to the Unity 8 cutover. After that is complete, many other things can be worked on, but there's no telling when VoLTE will get to the forefront of the priorities.
Fortunately, 3G retirements are not yet widespread. In the US, Verizon will be VoLTE only by the end of 2019, but other US carriers have longer timelines (2022), and while I've read of various Asian carriers wishing also to retire 3G, I don't believe that will be happening right away either.
What sort of things need to be done to get VoLTE support? How would I get started contributing to it?