Today Apple released its latest iOS update 8.1.1
Available over-the-air by going to Settings-General-Software Update
or by connecting your device to iTunes. Then select the device in sidebar, go to Summary.
In addition to performance improvements for legacy devices, Apple has said the update also includes bug fixes and increased stability.
iOS 8.1.1 is compatible with the iPhone 4S and newer iPhone models, iPad 2 and newer, and the fifth-generation iPod touch.
In addition, Apple TV software update 7.0.2 was also released today. It is compatible with third-generation set-top box hardware sold in 2013 or later.