Apple Pulls Ability to Restore iPhone 5c, iPad Mini, and More

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.