Just a friendly reminder to please keep the discussion On-Topic to the thread.
Very interesting. Thanks for the link to that article. The author mentioned that the feature will be available, starting with the iPhone 5. I know that iOS 9 will work with the iPhone 4S, so I can't see why iOS Wi-Fi calling would not work as well, unless the device has some kind of limitation. Time will tell.
Quick sort of off topic question - does Rogers support Wi-Fi calling on any non-iOS devices? Like Note 5, S6 etc? And same with VoLTE? Where is VoLTE?