Last night, Apple has made available to developers the first pre-version of iOS 9.2.1 on the Dev Center (read: iOS 9.2.1 beta 1 is available for developers).
Tonight, the Cupertino company has made available the public beta of iOS 9.2.1. If you want to download it now on your iPhone, iPad and iPod Touch, simply go to the Apple website at this address. Click on the blue button “Register”, Enter your account information and follow the on-screen instructions.
You will then be asked to register an iOS device by installing a profile. Finally, you can download iOS 9.2.1 beta 1 (release public) as well as future updates offered in preview by Apple (Settings> General> Software update). The final version of iOS 9.2.1 should be available to the general public in the coming days. It does not bring any notable novelty.