As per the FAQ I go to Settings/Cellular and hit "WiFi calling. I enter my address and agree to the terms and expect WiFi calling to be activated. When I go back to Settings/Cellular/WiFi calling is OFF and wants my address again. Is there something else I need to do to activate it. We are in a weak signal area but good wifi. It works with my wife's phone but not this new one. Is there an app needed? Is there some other setting that needs to be set?
