Wifi calling or VoLTE on AT&T???

Is it in the phone app's notification? Is it in the carrier network tile (with signal strength)? I don't need a screenshot if you can point out where it is roughly after double swiping down. This is just to ensure I'm not missing it, as I'm pretty sure I don't have it. I'm on AT&T.

Is there any way to verify that it's going over Wifi, short of walking into a Wifi-only dungeon underground? I can disable mobile data, but that keeps the voice channels accessible, right?
This is with WFC enabled, set to 'wifi preferred' and the cellular radio still on:

wfc.png
 
Is it in the phone app's notification? Is it in the carrier network tile (with signal strength)? I don't need a screenshot if you can point out where it is roughly after double swiping down. This is just to ensure I'm not missing it, as I'm pretty sure I don't have it. I'm on AT&T.

Is there any way to verify that it's going over Wifi, short of walking into a Wifi-only dungeon underground? I can disable mobile data, but that keeps the voice channels accessible, right?

As far as AT&T goes I think they only allow wifi calling on their AT&T branded phones. I have never gotten a non AT&T phone to work with wifi calling and was told by an AT&T representative that they didn't allow wifi calling on unlocked non AT&T phones.
 
As far as AT&T goes I think they only allow wifi calling on their AT&T branded phones. I have never gotten a non AT&T phone to work with wifi calling and was told by an AT&T representative that they didn't allow wifi calling on unlocked non AT&T phones.

Yeah, the only “non-AT&T” phone allowed to get WiFi calling is the iPhone.

At least VoLTE and HD Voice is working, couldn’t get those working with my Pixel.