Apple has pushed out iOS 8.3 to its millions of users. This update brings a number of enhancements and improvements to the OS, including a redesigned emoji keyboard with 300 new characters (including the Canadian flag), new languages for Siri (Danish, Thai, Swedish, etc.), new filtering options for the Messages app, and it fixes the issue of the Slide to Unlock crashing on some devices. It also improves the stability of WiFi and Bluetooth.
Check your iOS device to see if it’s arrived for you: Settings > General > Software Update. The update is around 300 MB depending on the device.