maxeon:
Not sure what you mean by phoning, but the location on the App is set to Oceania - which i presume they have a server in or around Aus/NZ. Yes the device talks back to their server so your mobile phone app still works while outside home if that's what you mean?
By phoning I mean just communicating back. Just wondered why it needed a server in between you and a mobile phone unless the server is updating software in the wall switch occasionally.