iOS 9.2.1 was released to developers on Wednesday, marking the first beta released following the official launch of iOS 9.2. We’re not quite sure what’s included yet, Apple didn’t say and it might take some digging. However, this isn’t iOS 9.3, so it’s probably not going to be as big of an update as the move from iOS 9.1 to iOS 9.2 was. My guess? You’re probably looking at some refinements in regards to stability and maybe things like battery fixes.
It seems possible that this update will bring back NumberSync, which was originally included in the iOS 9.2 betas but was pulled before the launch. NumberSync is a new technology from AT&T that will allow connected devices such as the iPad to take and receive phone calls even out of range of an iPhone.
We’ll let you know if there are any big changes spotted in iOS 9.2.1 beta 1. Developers should find it in the Apple developer portal now.