I wanted to run something by an expert before I tried this. So if I was to update an iPhone from iOS 9 to iOS 10, would I be able to restore the now-updated iPhone to iOS 9 using an iCloud backup? Or would I need to revert it to iOS 9 via .jpsw before being able to restore the phone's data?
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*9.3.5. They stopped signing .4 a couple of weeks ago. @Tetsujin – tubedogg Sep 19 '16 at 07:09
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oops, yup. There were so many in quick succession I lost track ;) – Tetsujin Sep 19 '16 at 07:10
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No, you cannot restore to a prior version of the OS. The backup only contains your data, it does not contain the OS itself.
tubedogg
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Ah, thanks. Would I be able to restore it after reverting the iOS using the .ipsw? – pianos Sep 19 '16 at 00:39