Originally Posted by LuHash
Just for your awareness, there's a way to enable both VoLTE and VoWIFI on MIUI V10 roms (xiaomi.eu included!).
Use these codes in the dialer:
I'm attaching a proof it works from the latest xiaomi.eu beta present on my Mix2s (polish carrier nju mobile/orange)
I don't see the VoWiFi signal in your screenshot, only the VoLTE. Has Xiaomi announced they will support VoWiFi now? I was always able to turn these settings on, but the only one that works is the VoLTE. The WiFi is not supported on the Mix 2s as far as I know with no plans to enable this feature. Even with system modifications, I was able to get the radios toggled on in the *#*#4636#*#* menu, but still none of the radios would actually connect as a VoWiFi call. Even by enabling different radios through QPST didn't enable VoWiFi, so I'm a bit weary of the last one.
If you can, please put your phone in airplane mode, then connect to WiFi only and attempt to make a call. If it works, then VoWiFi is truly enabled. If not, then you just have a fancy setting that doesn't work. Can you please try and report back. Because if this is true, it would eliminate a huge issue of reception in my house, and I will hesitantly head back over to my windows machine to toggle my radios back.