Downloaded iOS 11 but found that you don’t like it for whatever reason? Well, too bad — because Apple has officially done away with the ability to let you downgrade back to iOS 10.
As it usually does following the release of refreshed versions of iOS, Apple’s stopped signing iOS 10.3.3, last year’s final version of Apple’s iPad and iPhone operating system. While Apple always gives a brief window to let you downgrade to the previous version should you want, that window has now closed for iOS 10.