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Free iPad iPhone iPod Touch Jailbreak Support > iPhone 4 downgrade

Can I downgrade iPhone 4's firmware to do a untethered jail brake?
October 24, 2011 | Unregistered CommenterFrankie Bass
If you have saved SHSH either from previously jailbreaking or from using tinyumbrella then yes you can downgrade, but if you do not have SHSH there is NO way to downgrade.
October 24, 2011 | Registered Commentertherealcmac