Apple released a first beta for iOS 9.2.1 with minor improvements, and performance improvements. The new build stamped number 13D11is available to download for registered developers in Apple’s Dev Center. The public version of iOS 9.2.1 might available to install over the “air” tomorrow.
Apple had released only last week the final version of iOS 9.2. The update brought among other improvements in Apple Music and supporting the Lightning to USB Camera Adapter and Lightning to SD card reader.
You can install iOS 9.2.1 beta through Apple’s developer website. This requires to register your device with a developer account. Later betas in this series can install via iTunes or via the iOS settings. Go to Settings> General> Software Update.
iOS 9.2.1 beta 1 at the time of writing has just been published.