![]() The firmware still exists, but is now unsigned rendering it unusable. This action on Apples part effectively burnt the bridge for updating units at or below iOS 7. The signature is required to verify and validate a proper update. The error code 9 problem started in October 2015 when Apple removed their signatures from all down level firmware. A device must be progressively updated through iOS levels of 5, 6, 7, and 8 before updating to 9. It is not possible to perform a direct update from iOS 4 to iOS 9. They have taken advantage of their customers who have not updated the iOS in their products in a timely manner. ![]() ![]() The root cause is Apple Computer has come up with a way to cause early obsolescence of perfectly functional products. There are hundreds of incidents reported on the Internet with this same problem. I have now spent several weeks researching the error code 9 issue resulting from trying to update a device at iOS 4.3 level to iOS 9 level. ![]()
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