Apple Restores Baseband Signing for iOS 6-10 Legacy Devices After Blocking Downgrades
Updated
Updated · MacRumors · Jul 9
Apple Restores Baseband Signing for iOS 6-10 Legacy Devices After Blocking Downgrades
3 articles · Updated · MacRumors · Jul 9
Summary
Apple restored baseband signing for all affected legacy cellular iPhones and iPads by 12:24 p.m., reversing a change that had blocked restores and downgrades on older software.
The issue was unusually narrow: Apple had not unsigned the iOS builds themselves, but the modem firmware tied to them, which prevented OTA and IPSW installs through Finder or iTunes.
iOS 6 through iOS 10 releases on cellular models including the iPhone 4, 4S, 5, 5c and several iPads were hit, while Wi-Fi-only iPads were unaffected because they have no baseband firmware.
Apple first fixed the iPhone 5c on iOS 10.3.3 and 10.3.4 at 12:00 p.m., then restored signing across the full list; devices already running their firmware had continued to work throughout.