I have a Pixel 2 XL and when I try to make a phone call I get a message server error. Try again later.
When I turn off Advance Calling I'm able to make out going calls. When I turn it back on the error comes back on.
Troubleshooting I have tried.:
1. reset the network settings and rebooted.
2 .removed HD Calling from my products and step 1 ( removes advanced calling from settings menu)
3. added HD Calling back in my products and step 1 ( advanced calling option returned)
I'm able to receive calls when advance calling is on. I even get an HD indicator when on the call. Just can't call out.
I thought I could live without HD calling but I'm getting old and I have trouble hearing the other party. You don't realize how bad regular cellular bandwidth is until you have to use it again.