However, since Apple has patched the loophole that allowed users to use SHSH blobs in iOS 7 or later, TinyUmbrella's iOS downgrade method doesn't work anymore. TinyUmbrella is an iOS downgrade tool that can save SHSH blobs (Apple's signature protocol for iOS restores and updates), and use the blobs to create a pre-signed IPSW firmware file that can downgrade iPhone/iPad to an older iOS version even if Apple has stopped signing the version. It often discontinues signing a particular iOS firmware after the release of a new version, and thus stops users to downgrade. What is TinyUmbrella?Īs we all know, Apple encourages users to update iOS to the newest version and doesn't allow us to downgrade to older iOS versions. And if you are the latter, please jump to Part 3 (opens new window) for a foolproof tool to downgrade iOS 11.1.1 to iOS 11.1/11.0.x without iTunes. If you belong to the first kind, you might have heard of TinyUmbrella and wonder if it is a workable iOS downgrade tool that can help you. For regular users who have installed latest iOS 11 and don't like it, they just want to roll back to iOS 11.1 from iOS 11.1.1. For jailbreakers, they often downgrade iOS 10 to iOS 9, iOS 9 to iOS 8, iOS 9 to iOS 7 so that they can jailbreak.
There are two kinds of Apple users that want to downgrade iOS on their iPhone/iPad.
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