ZABIAS:
http://www.iphoneheat.com/2010/08/jailbreak-iphone-3g-ios-4-0-2-with-redsn0w-0-9-5b5-5/
vypichnu jen to dulezite:
Step 2
Restore iOS 4.0.2 on your iPhone 3G. you need iTunes 9.2.1 to do that. (Links below)
Step 3
1. Run the downloaded redsn0w 0.9.5 beta.
2. Hit the Browser button. Select the iOS 4.0 IPSW file. (Yes iOS 4.0 NOT 4.0.1, that’s the tricky part)
takze nejdriv udelej update na 4.0.2 pres iTunes (tedy ofiko ne JB)
pak do redsn0w nacti 4.0 a udelej JB