How to Upgrade Your iPhone to iOS 5.1 Without Updating Your Baseband (Win)

How to Upgrade Your iPhone to iOS 5.1 Without Updating Your Baseband (Win)

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AK - April 24, 2013 at 6:02am
I have Iphone4 with ios 4.x.x, cand I still upgrade it to 5.1.1? Itunes gave me 3194 error (Apple not signing old ios). Can I upgrade ios without using itunes and use redsn0w IPSW restore? or I have to use itunes and upgrade to the current IOS and downgrade back to 5.1.1?