A:Answer I have the vivo XI + on the TMobile network 128gb/6gb
And have found No wifi calling option in the settings menu. (Contrary to what some have said here)
Perhaps those people mistakingly confuse using services like "what's app and wechat" which do work,.. as wifi calling
Instead of "real wifi calling" which is,
"Dialing a normal number" using WiFi instead of a cell tower signal.
For what it's worth, I also actually called TMobile tech support... and they told me only TMobile specific phones do it... NOT unlocked phones bought elseware.
