I had a Google pixel 4a and my wifi calling worked fine. Unfortunately the battery kept dying and was unable to take a picture with phone without phone restarting. Long story short I bought a new phone and put my Sim in it. It is a Galaxy A15. My wifi calling worked for a few days and then stopped working. I have tried on multiple occasions to connect it where I have wifi and cell service. It connected and said wifi was enabled but it still will not work and makes me do the whole process again.
I need wifi calling as I do not have any cell service at home or in this area.