Downgrading to iOS 9.3.3 now impossible as Apple stops signing older firmware
2016 August 24
Nearly three weeks after releasing iOS 9.3.4, Apple has closed the singing window for iOS 9.3.3 and iOS 9.3.2, making it now impossible to downgrade from the latest firmware version available to these older ones.
Source link: http://www.idownloadblog.com/2016/08/24/downgrading-to-ios-9-3-3-now-impossible-as-apple-stops-signing-older-firmware/
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