This problem only started happening sometime last year, or in late 2019. It used to work just normally, the call would connect over the LTE network. Now, when I call, the LTE icon disappears and returns only once I end the call. I have looked all in the settings of the phone and Google Voice for something having to do with turning off the mobile data, or only using it over WiFi, but I seem to have everything set to prefer WiFi, but still use mobile data.
Is this a new Verizon policy? To not allow this kind of a number to make a call over their data network?
I am using a Samsung A20.