Apple has released iOS 9.2 beta 4 to developers for testing. The build number is 13C5075.
This is a pre-release version of iOS 9.2 for iPhone, iPad, and iPod touch. Devices updated to iOS 9.2 can not be restored to earlier versions of iOS.
Previous builds of iOS 9.2 beta have brought support for AT&T NumberSync, an improved View Controller for Safari, and Arabic Siri support.