This week I’m travelling in Austin, TX again, and now my home provider Elisa EE sent a message “calls only possible via VoLTE”.
Except I have never gotten X10II or now X10III to register with VoLTE on any roaming mobile provider in any country, ever since VoLTE landed in SFOS.
“4G calling” stays in endless pulse loop 
They aren’t kidding either, I tried a tested this morning (for a reason), and calls fail immediately after dial attempt.
So if anything unexpected happens, I’m not in a great position to call anyone on mobile network. Data connection works great, and most people are on apps, so maybe not a deal breaker. But what about emergency calls?
@rainemak what are the chances of escalating VoLTE vs roaming on the roadmap? What if something simple is missing in implementation code for roaming, and SFOS travellers are suffering for years because noone looked at it?