How To downgrade or upgrade unsigned iOS firmware version

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In this Post, I’ll tell you how to downgrade or upgrade unsigned iOS firmware version, As we all know that Apple is very good at patching and whenever they release a new iOS update they stop signing the old version because of that we only have one option upgrade. Today I have a good news for all iOS users now you can downgrade or upgrade unsigned iOS firmware version using a Tool called Prometheus, but there is a catch in order to downgrade or upgrade unsigned iOS firmware version you must have saved SHSH2 blobs. Following are the videos from the developer who developed this tool.

downgrade-or-upgrade-unsigned-ios-firmware-version

How To downgrade or upgrade unsigned iOS firmware version:

Following are the instruction that you should keep in the mind before moving on.

  • Prometheus only if you have SHSH2 blobs saved for the unsigned firmware.
  • You cannot downgrade or upgrade, If you don’t have SHSH2 blobs saved for the unsigned firmware.
  • You can downgrade or upgrade ( 9.x to 9.x ), ( 10.x to 10.x ), ( 9.x to 10.x ), and iOS 10.x to 9.x is not possible.

Prometheus: Set nonce with nonceEnabler (jailbreak) method:

Prometheus downgrade/upgrade 64 bit devices: