No Downgrade: Apple Stopped Signing iOS 9.3
Are you planning to downgrade your device to iOS 9.3? Well, unfortunately your time is up. Apple has just stopped signing iOS 9.3 after stopping the signing of iOS 9.2 and iOS 9.2.1 in the last few weeks. Interestingly enough, only newer devices such as the iPhone 6s and iPad Air 2 are affected. Older devices such as the iPhone 5s are exempted for now. An iOS downgrade fom 9.3.1 to 9.3 is therefore not possible anymore. If you try to restore your iOS device to 9.3, iTunes will prompt you to simultaneously upgrade to iOS 9.3.1, the latest stable version of the mobile operating system by Apple.
Yesterday, Apple decided to stop signing iOS 9.3 and therefore make a downgrade to this version impossible for users. You can only update or restore to iOS 9.3.1 or later from now on. Given that iOS 9.3.1 is running quite excellently on most of the devices and future updates look very promising in terms of performance, we recommend updating to the latest version. Jailbreakers are stuck on the more recent versions either way, as there is no working jailbreak tool for iOS 9.2 and above (which includes iOS 9.2.1, 9.3, 9.3.1 and later). It has been a while since the last jailbreak has been released, which gives rise to the thought that Apple is making it harder for the hackers to do their job.
The iOS 9.3 release had suffered from the extremely annoying link bug, which made your browser and/or device freeze or crash when tapping regular old links in Safari and other affected apps. Fortunately, iOS 9.3.1 came rather quickly and Apple managed to patch up the problem in a very short amount of time. iOS 9.3 is also the harbinger of new features such as Night Shift Mode and new protective measures in the Notes app, which allow you to lock down your notes with Touch ID to keep prying eyes away.