voLTE is driven by your network offering it and it's sim card @Anonymous User and eligible phones and being in a 4G area.
and some networks ( I can only speak for the UK) offer voLTE on phones supplied by them.
The iPhone being the exception.
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
