Get the latest tech news
Apple Pulls Ability to Restore iPhone 5c, iPad Mini, and More [Updated]
Apple has stopped signing several older versions of iOS for a group of legacy iPhone and iPad models, cutting off the paths to reinstall or downgrade the affected software. Apple will no longer validate over-the-air (OTA) or direct IPSW installs of the builds in question. Once a version is unsigned, there is no longer a way to restore or install it through Finder or iTunes. The change is narrower than a typical signing update. Apple has not stopped signing the iOS versions themselves.
None
Or read this on Mac Rumors
