In the meantime the phone is available for almost six months. It's a shame that the device still does not support VoLTE in most countries (Switzerland in my case). For me this is one of the most important features.
ASUS: Can you share any news on that topic?
BTW: I was in contact with regional support. First, in November, they promised to add that feature soon via a firmware update. Now, the replied that they are not sure if the feature is ever introduced...