Can anyone on here confirm that they are using an iPhone 6 (NOT the 6s) and have VoLTE working?
I'm on 9.1 with 22.1 and no VoLTE.
Mine doesn't even give me that option. In Settings -> Cellular I have an option that says 'Voice & Data - LTE' and when I tap on it I only have the choice of 2G, 3G, LTE.
I did. Even tried a hard reset (or what ever the power + home is called).
I even just tried downloading the 22.1 carrier settings directly and re-installing it using iTunes. Hmmm