iPhone and iPad users should be getting a software update notification today as Apple is pushing its newer iOS 8.1.2. Weighing about 28MB in size, the latest update is quite a minor one as it addresses an issue where purchased ringtones from iTunes. It also includes tweaks and fixes for previous bugs as well.
The update is applicable for iPhones from iPhone 4S and above and iPads starting with iPad 2. If you haven’t gotten any notification yet, you can check manually at Settings> General > Software Update.