#is it possible to downgrade to 15.0 with a back up on ur mac?

9 messages · Page 1 of 1 (latest)

zenith moon
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is it possible to downgrade to 15.0 with a back up on ur mac?

quartz sigilBOT
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@zenith moon thanks for creating a new thread!

Please use /solved to delete this thread when you're done.

nimble wadi
zenith moon
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can i use my mom's iphone 13 which is on 15.1 to downgrade my iphone 12 from 15.6 to 15.1?

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via her blob or something

nimble wadi
# zenith moon via her blob or something

No, blobs are device specific and even if you had a valid SHSH blob you cannot downgrade to anything below iOS 15.4 because Rose firmware is incompatible and will bootloop you

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!t blobsfaq

quartz sigilBOT
# nimble wadi !t blobsfaq
blobsfaq

What's a blob?
It is a file containing a special key specifically for that one device to allow downgrading to a specific firmware.
They're like golden tickets, but instead a digital signature made by Apple that was saved at the time when the signing window was open. If you possess one (or many), keep them safe.

How do they work?
They can be used in a program called futurerestore to restore to a firmware in which the SEP/Baseband is compatible. To check SEP/Baseband compatibility, check /tag sepbb.

Make sure to not use misleading sites.

Regardless of SEP/Baseband compatibility, any/all blobs should be saved for future downgrading abilities.

Can I save them now?
Of course. Blobs can be saved at any time, but it is crucial to save them when Apple releases new firmware, because they can only be saved for versions that are currently signed.There is one exception to this: if you are jailbroken and Apple has unsigned the version you're currently on, you may save onboard blobs for that version.

Added by eric#1997 | Used 1,107 times ·
zenith moon
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oh ok thanks