Hi all,

I'm using Xiaomi Mi 10T Pro, I insert my friend's DiGi SIM card to my phone and VoWiFi is working fine.
However, my Maxis VoWiFi is not working on my phone.
Strange is, when I insert my Maxis SIM card to an iPhone, VoWiFi is working!

So, is my phone actually support VoWiFi? If not, why DiGi SIM card's VoWiFi working fine in my phone?
Is there many VoWiFi standard available in the market?