Start Updating and restoring ipod touch software

Updating and restoring ipod touch software

Obviously downgrading isn’t necessary for non-jailbroken devices because there is no reason one would really want to downgrade, but for Jailbreakers, maintaining the ability to downgrade is always a smart thing to do.

You can look through the list below and find one that suits your current situation.

What is happening is Apple refuses to generate the new hash during the downgrade, meaning the new SHSH blobs cannot be generated.

In case this wasn’t a big enough limitation to downgrading i OS devices, in the i OS 5 firmware generation Apple introduced yet another technology to prevent downgrading called APTickets.

In order to prevent firmware restores Apple only signs one firmware version at a time, which is obviously the latest firmware version available.