phone icon with wifi symbol meaning

[android378]

I have AT&T and a Samsung Galaxy S7, and have just started noticing a phone icon with a WiFi symbol above it. Is this a stock icon from the galaxy itself? (when the wifi enabled symbol appears, isn't it at the very right side of the notifications bar and not towards the left like it shows on the attached screenshot?)

 

[PapaGary]

Wifi calling enabled?