With yesterday’s release of iOS 8.3, users on Sprint and EE in the UK can now take advantage of Wi-Fi calling. While the feature was initially debuted in iOS 8, only T-Mobile supported it at initial launch; for whatever reason other carriers seem to have been excluded up until this most recent iOS update, with Sprint issuing a formal press release, and EE more quietly announcing it via a posting in their community forums. An update to Apple’s…