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what's going on YouTube GS here today
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we're talking about iOS downgrading
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especially for the newer devices like
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the iPhone 14 13 12 15 stuff like that
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so as you probably know downgrading used
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to be possible and you required saved
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shsh blobs in order to do it saved shsh
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blobes essentially saves the response
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that Apple gives when you try to
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downgrade to a version now every time
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you restore your device if the iOS
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version is signed for example these in
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here which are signed for this iPhone
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the device will actually perform a check
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and it will verify the response with
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apple and if Apple says it's not signed
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you're going to get an error now what we
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used to do was to save that response
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back when it was still signed for
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example for iOS 17.6 so that once it
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becomes unsigned I can still use that
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response from earlier to trick the
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device into believing that it's still
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signed that's in a nutshell how shsh
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blobs used to work and they have been
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the pillar of iOS downgrades for
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literally years so we have tools for
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this purpose for example we have blobe
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saver over here created by air squared
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it's this one over here available on
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GitHub and this tool still works to this
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day and I definitely recommend you to
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save your blobes once in a while and
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you're going to ask me why if it's not
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possible to downgrade that easily
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anymore why you should save the blobs
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well because it takes just a couple of
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seconds you can just connect your device
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to the computer press a couple of
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buttons in here and you have the blobs
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saved which means that in the
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eventuality that at some point we find a
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method or we develop a tool that can
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bypass the new changes in iOS introduc
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in iOS 16 you might be able to downgrade
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in the future however if you do not have
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the blobs saved you will not because
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those are indeed mandatory we cannot
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skip those so what's the issue with iOS
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downgrading well we have the document in
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here from cryptic from last year that
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explains it very very well I will link
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it down below because it makes a lot of
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sense for you to read it it also
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explains how downgrading used to work
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but tldr essentially in iOS 16 Apple
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introduced some new component called
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cryp X1 which is a virtual co-processor
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that they use for the rapid security
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responses update and that essentially
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prevents us from downgrading not because
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it's made to do that but because it's
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almost always incompatible from one
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version to another which means that you
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can downgrade with saved blobs but only
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from minor versions for example from IOS
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6.3.1 back to 16.3 from 17 let's say 6.1
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back to 17.6 and stuff like that going
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from one major version to another
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definitely breaks that cryptex component
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they're not compatible and the downgrade
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fails that's the whole reason iOS
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downgrades have stalled in the past
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couple of months because we don't have a
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solution to fix that cryptox component
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at the moment but you should still use
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blob Saver in order to save your shsh2
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blobs even if you cannot downgrade right
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now your device because of cryptex we
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might be able to come up with something
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in the future we might be able to find a
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workr using this is pretty simple I have
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this article in here that demonstrates
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how you can do it it's not a complicated
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procedure to save your blobs and even if
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they are completely useless now because
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of the cryptex component as I said you
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might find a use for them in the future
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as new tools get developed as new
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techniques get invented we might be able
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to use them again in the future so it's
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still a good idea to save them no you
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cannot downgrade right now downgrades
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are indeed dead at the moment on iOS on
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anything newer than let's say iPhone 10s
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or 10s Mac but you should still save
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your blobs it's still as important as
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ever even though some people believe it
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isn't so you should definitely take the
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few seconds save them just in case
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because you never know so thank you for
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watching I am Gio snow till the next
