On December 8th 2015, Apple Inc released iOS 9.2 after making few changes in the operating system. This system was debuted on June 8th, 2015, with iOS 9.2 beta 1 being made available to registered developers.
After many necessary changes iOS 9.2 is finally here to help you with under-the-hood improvements and battery betterment. According to Apple, till 21st September 2015, iOS is already installed on more than 50% of iOS devices. As of November 8th, 2015 iOS 9.2 is installed in around 70% compatible devices. This operating system is fast than any of its predecessors.