A couple of days back, we discovered that the only iPhone that can be jailbroken on iOS 4.0.2 is iPhone 3G. Anyone having iOS 4.0.2 on their devices was simply out of luck to jailbreak iPhone 4 and iPhone 3GS.
But looks like there is already a workaround for that. You can jailbreak iOS 4.0.2 and then unlock iPhone 3GS (on 4.0.2 iOS) with Ultrasn0w 1.1-1.
If you haven’t noticed, iPhone OS 4 has now been renamed to iOS 4.0, also announced by Steve Jobs at the WWDC 10. So coming back to the topic, yes,how to jailbreak iOS 4.0 with RedSn0w!
Sn0wbreeze, the latest tool to jailbreak iPhone 3.1.2 firmware has been released by the iH8sn0w dev team. It is just like any other jailbreaking tool like the Pwnage Tool, redsn0w, blackra1n and WinPwn.
Sn0wbreeze is available for free download and can be used to jailbreak iPhone and iPod Touch both.
Similarly, the iPhone Dev team is now back with their very own tool to jailbreak iPhone 3.1.2 – Redsn0w 0.9