It’s just a few days from the beginning of the new year and Apple has rolled out it’s first public OS update for 2016. While iOS 9.2.1 beta test has been in existence since December 16 for basically developers, the update has been rolled out for the public.
Based on the update description, it brings the usual suspects to the table consisting of security update as well as bug fixes including a fix for an issue that could prevent the completion of app installation when using a Mobile Device Management (MDM) server.
To update, simply navigate to Settings > General > Software update. The next update iOS users should be looking forward to is iOS 9.3 which is currently in beta testing stage.