[AnthonyMouse]

But you still have a cellular connection, it's just metered. Which doesn't matter because checking if your date is running late uses a trivial amount of cellular data. Whereas if it turns out that they are late and now you've got an hour to kill and want to watch Netflix on your phone, you connect to the local WiFi.

Which it will have done automatically at home and at work and anywhere else that you actually frequent, so having to do that is rare.