Ok I Upgraded to the official 2.2.1 upgrade from apple. I'm using Pwnage Tool. I'm running a Black Macbook with 10.5.6 but I did do the download to enable DFU mode. So I've already downloaded and made the custom firmware 2.2.1 and i'm trying to install it on my phone but after itunes extracts the file I get the error message, "The iPhone "iPhone" could not restore. An unknown error occurred (21)." Can someone please help me?
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Upgrade to jailbroken 2.2.1 help
- Thread starter brentoniscool
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Which download did you try? The one from the Dev Team blog?
You may need to try a powered USB hub which seems to work for pretty much everyone.
You may need to try a powered USB hub which seems to work for pretty much everyone.
I too have the same situation, I've tried it so many times... restarted, re-downloaded, restore, etc... still not working... keeps giving me that error 21 
i dont have a usb hub so i cant try that...
i dont have a usb hub so i cant try that...