I have Verizon and recently turned on wi-fi calling on my iPhone. The strange thing is that when I'm home I only see the Verizon and the wifi icon but when I'm connected to wifi at my friend's house, I see a Verizon Wi-Fi and then the wifi icon. Does that mean that I'm connected to wi-fi calling at his house but not in mine? I'm confused... what's the difference and how do you know you're connected to wi-fi calling?