There’s a new iOS 9.2.1 update within the Settings app awaiting all iPhone, iPad, and iPod touch users today. Apple released the first developer beta version of the software update in mid-December after shipping iOS 9.2 earlier in the month. The second iOS 9.2 beta was later released at the start of January. Apple has since started testing iOS 9.3 with developers and public beta testers.
As the version number suggests, iOS 9.2.1 so far hasn’t included any major feature changes or enhancements, and the official release notes only reference bug fixes, security improvements, and an MDM server issue fix.