any iphone nerds? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

daftphunk · 01-13-2011, 02:54 PM

You can't 'upgrade' to any older firmware because for you to upgrade, Apple has to digitally sign off as an approval - they stop signing off on older firmwares once a newer one is released. You can only bypass it with Tiny Umbrella if you have your SHSH blobs stored on the Cydia server.

And since you're using redsn0w, blackra1n, etc.. I assume you have had your phone Jailbroken at some point? And if you ever did, did you save your SHSHs on Cydia (ticking the 'Make my life easier' option)? If so, then you will be able to go back to 3.1.3 and then try upgrading again.

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01-13-2011, 02:54 PM	#14
daftphunk Zilvia Addict Join Date: Feb 2010 Location: Seattle, WA Posts: 767 Trader Rating: (8) Feedback Score: 8 reviews	You can't 'upgrade' to any older firmware because for you to upgrade, Apple has to digitally sign off as an approval - they stop signing off on older firmwares once a newer one is released. You can only bypass it with Tiny Umbrella if you have your SHSH blobs stored on the Cydia server. And since you're using redsn0w, blackra1n, etc.. I assume you have had your phone Jailbroken at some point? And if you ever did, did you save your SHSHs on Cydia (ticking the 'Make my life easier' option)? If so, then you will be able to go back to 3.1.3 and then try upgrading again.