Activating VoLTE in Moto X Force

I had recently had a hand on my friend's Moto X Force 1580. The phone works on Android 7.0. I went through the web and found out some guys claiming to make Moto X Style to work on VoLTE. I followed the same procedure but had no luck. Following is the procedure that I went through. 1) Dial *#*#4636#*#* 2) A hidden menu would start, select "Phone Information" 3) In this window, there is a switch that says "VoLTE provisioned". This by default is off, turn this on 4) Restart the phone. I tried this number of times, but it turns back off every time. Can anyone help?