Flash Unsigned Ipsw ^new^ Page

If you saved (signature hashes) while the version was still signed, you may be able to downgrade using tools like:

Example command flow (simplified):

Sometimes Apple signs OTA updates for older versions for a short window. Using a delay-ota.mobileconfig profile, you can install slightly older versions (usually 60–90 days after release), but not truly unsigned versions. flash unsigned ipsw