Sorry if this is already asked elsewhere. I heard rumors that the Pixel 2, not the OG Pixel was finally able to use AT&T VoLTE, and VoWIFI calling. Any truth to that rumor? I have the OG Pixel XL and on Verizon, so no way I can test for myself.
Some people reported seeing VoLTE enabled with the 8.1 developer preview. I don't think anyone has seen wifi calling working with AT&T though. I'm pretty sure for wifi calling AT&T has to authorize it and when I tried to have it enabled, the AT&T rep said he could not override it for my account because the Pixel is not an AT&T branded phone.
I have the November update and see neither VoLTE nor wifi calling enabled.
when I was on the 8'1 beta I had VOLTE, now that I opted out and I'm on the nov. security patch the VOLTE is gone so it will be in the public release of 8.1. doubt we will ever get wifi calling