Checked my carrier's volte page. It doesn't mention any model specific it just mention if your phone supported the technologyit could be that your carrier has a set list of "allowed" device models. (can also definitely be a problem with my module too).
My carrier is Vodafone NZ and I tried using other vodafone mbn files like UK and Germany but I still can't get IMS registered too.
I'll keep trying to make it work, though.