I have used wifi calling for a long time. Recently my phone has been dropping calls at home. I use wifi calling because I only get either no bars or just one bar of mobile reception in my house. So I double-checked that wifi calling was on. It was but it was set to mobile network preferred and there was no longer a choice to use wifi as there was before.
I don't understand why the only choice is to use mobile network. Isn't the point of wifi calling to use wifi because you have little to no reception at the time. And if I'm losing calls in my house then it's not switching to wifi. (Which I read is supposed to happen)