Fan Chat is not a section where we are actively responding to queries , the new ZenTalk forum here focuses on ZenFone 6 and ROG Phone II - the moderators I think are quite active there and helpful where we can provide service.
As to VoWifi, the support depends a lot on operator cooperation , and its enabling or not is not a global setting switch that we can "turn on" at will. Validation with every operator and cooperation with every operator is a necessity in order to ensure proper function.
If the answer you want is "VoWifi is working in India" then I cannot give you that answer , nor are we able to provide any clear guidance on if or when this would happen at this point.
