Apple has released iOS 9.2.1 bringing security updates and bug fixes.
This update contains security updates and bug fixes including a fix for an issue that could prevent the completion of app installation when using an MDM server.
For information on the security content of this update, please visit this website:
Apple security updates - Apple Support.
Apple has already released a preview of iOS 9.3 which brings numerous new features. Check out what's new in iOS 9.3 here.
Where to Download iOS 9.2.1: Apple Official Firmwares iOS 9.2.1