It is not activated by default. I have to enter a code. The manufacturer says My provider, which is Bell, needs to register my ROG phone 8 for VoLTE. Right now my VoLTE Is activated on my end.
based on the the link you provided, my ROG Phone 8 base model is compatible with Bell. But my VoLTE Or VoWifi is not working. whenever I call my signal goes to 3G in which will be a problem once 3G will be taken down no?