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xcodedowngradeios

Restoring older firmware through XCode?

I'm trying to restore iPhone OS 3.1.3 to a 3GS that has been upgraded to iOS 4. iTunes refuses to complete the install. What needs to be done? I am currently using the GM XCode. Should I be using the latest public stable version instead?

Update:

XCode reports that "The baseband cannot be rolled back".

Solution

  • This link has some answers.

    BlackRa1n gets the iPhone out of the reboot loop after a failed baseband rollback.