iOS 10.2.1, watchOS 3.1.3, and tvOS 10.1.1 are all released to fix minor bugs

Beta builds of the more significant iOS 10.3 should follow soon.

Andrew Cunningham - 1/23/2017
 
After several weeks of beta testing, Apple has released iOS 10.2.1 to the public today. The update is fairly minor and includes no major improvements to core iOS apps or features. The release notes say only that it fixes bugs and includes security improvements. The security page for the update lists a number of vulnerabilities in the kernel, WebKit, and the Contacts app that have all been fixed. Apple also addressed a bug that could allow attackers to briefly access the home screen on an Activation Locked iPad that had been reset.
 
Full Article