title: Which API decides if the call is going through VoLTE or VoWiFi in Android?
body: <p>I want to write an xposed module where I can redirect VoLTE calls through VoWiFi. I want to know which method decides if the call is going through VoLTE or VoWifi and I would hook that method and get the work done.</p>
  
  <p>Basically using WiFi I want to give the network an illusion that the device is using mobile data and send calls through wifi</p>
  
  <p>Note : I am new to android programming. Excuse me if my question looks vague.</p>