I've gotten a new connection with Vi (an Indian telecom operator resulting from a merger of Vodafone India and Idea Cellular) and found that VoLTE wasn't working on my ROG Phone II (I001DE). I called them up and they said it isn't supported. -_- But the thing is, I've been using my old Vodafone connection (also on the Vi network now) with VoLTE ever since I bought the phone 10 months back, and it works even today in the second SIM slot. They had no answer for that. Can Asus please get this sorted out? I don't think Asus would have to do anything other than getting Vi to recognize that it's supported since it's already working.
PS. Can @Anders_ASUS or somebody else PM me? I need help with a different issue.