A:Answer I am on Sprint and switched from S6 Edge which was Sprint version to S8 Unlocked. As soon account has been updated to new unlocked S8 - WiFi calling feature "disappeared" from my account ( as well as there is no icon on S8 Settings menu as it used to be on S6 Edge).
However, by "pocking" around phone settings I found and successfully tested WiFi calling feature- try and see if this will work for you as well.
Make sure you are connected to WiFi network.
Touch Phone icon ( as you are going to make a call), touch Menu at the top upper corner ( three dots) - choose "Settings".
Scroll down to the "WiFi calling", turn it ON.
Go through the simple setup ( your address, etc.)
Make your WiFi call to see if it works for you as it worked for me. Let me know.
I used WiFi calling very often in the past with S6 Edge when I was on trips overseas and it is a deal breaker for me.
Have not tested it outside of US yet but considering that WiFi calls I made as a test here, worked - I would be surprised for this feature not to work outside of US.
