Apple's goal for some time was to always expiring signatures on iOS versions to lrevent diwngrades. This could be why Apple doesn't care about 3rd party sites offering diwnloads of all versions across all models of devices, even though they are point to Apple servers to download the .ipa bundle., without a valid suganture, you ll get an error in iTunes when you try to restore. Knowing this, why was the remark to "prevent downgrading" was "....we remove something in iOS to prevent this" when in fact its not true? The restore diesn't happen on the device, it happens via iTunes, and since all Apple is make the sigantures invalid, that's all there needs to be do e to prevent downgrading. Or was a fake??