I have a OG Pixel and a Pixel 2 XL both with ATT Sims and both get updates as normal.
This will work on a Verizon pixel as well correct
Yeah HD Voice/WiFi calling/etc. works like it should on T-Mobile & Verizon. AT&T with 8.1 added HD voice.
Awesome stuff. Will I also have to add at&t son settings? Assuming I will unless that also gets acquired automatically in 8.1
Their APN settings? Should have it once you have the SIM in there. 8.1 should also be available for it since it has been out for awhile.