RE: simultaneous voice and data not working. It looks like it's a device/radio issue. I reached out to Google Nexus support and they replaced the phone (just received it) and I can confirm that voice and data are working properly. No change to my VZW account and using the same SIM from the...
Did you turn your phone off? or just straight up pop-out, pop-in while powered on?
I still can't get voice and data to work. Have tried turning advanced calling off/on, and Advanced LTE off/on, reboot between setting changes, etc. no love :(