Apple Releases iOS 9.2 with Improvements and Bug Fixes
December 8, 2015, iOS 9.2 was released. Users of Mac OS X 10.7.5 or earlier can not sync with this iOS. Do not upgrade, until you verify you can to 10.8 or later. There is also this tip on iTunes/Mac OS/iOS compatibility. This update contains lots of bug fixes and stability enhancements aimed at making the mobile operating system more stable, secure and efficient.
iOS 9.2 is compatible with iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPad 2, 3, 4, iPad Air, iPad Air 2, iPad Pro, iPad mini, iPad mini 2, 3, 4, iPod touch 5G and iPod touch 6G.
You can upgrade to iOS 9.2 using the Software Update section on your iOS device or via iTunes. Below you will find the instructions.
Update the iOS software on your iPhone, iPad, or iPod touch - Apple Support
Additional information about iOS 9.2 is available on Apple's official website as well as on trusted news website at link.
About the security content of iOS 9.2 - Apple Support
http://www.imore.com/apple-releases-ios-92-apple-music-accessibility-improvement s-and-more
If you face any difficulties with the update, use the troubleshooting steps suggested by Apple:
Resolve iOS update and restore errors in iTunes - Apple Support
Get help with iOS update and restore errors - Apple Support
If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support
[IMPORTANT] IF YOU DON'T SEE ANY UPDATES AVAILABLE FOR YOUR DEVICE, WAIT A BIT AS APPLE SERVERS MAY BE CURRENTLY OVERLOADED. RESTART YOUR DEVICE AND TRY SEARCHING FOR UPDATES LATER.
Feel free to edit this user tip and ask questions if you face any difficulties with the update.