How to check ipsw signing status oct 15, 2016 - 18 comments whether or not an ipsw firmware file is signed determines whether or not you can use that ipsw to update ios or whether or not you can downgrade ios to a prior version.. Apple has now stopped signing ios 8.4, making it impossible to downgrade or upgrade, without losing your jailbreak. when you restore or update your device in itunes, you will automatically get ios 8.4.1, but now you do not have the option to manually select your ios 8.4 firmware, as itunes will not. Apple has closed signing windows for ios 8.4.1 and ios 9, making it impossible for ios users to upgrade or downgrade their iphone, ipad or ipod touch to either of the versions..
Below are the direct links for the ios firmware updates that have been released for the iphone by apple so far. if you’re not sure which firmware file to download for your iphone, then check the post which will help you identify which firmware file to download based on your iphone’s model.. As you can see above, tinyumbrella has saved the shsh blobs for my iphone 6 plus for ios 8.2 and ios 8.1.3. it is because apple is currently signing ios 8.2 (which is the latest version currently) and ios 8.1.3 (apple tends to stop signing the previous version in a week or two).. Both iphone and ipad users who want to restore their devices to ios 8.1.2 are now out of luck as apple has stopped signing this firmware. in short, it is not possible to downgrade from ios 8.1.3 to ios 8.1.2. even if you have backups of ios 8.1.2 files, you will still not be able to restore via itunes..
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