Breaking News: Redsn0w Can Jailbreak iOS 4.0 GM

Jailbreak tool for beta 4 iPhone OS 4 for iPhone 3GS

Apple had renamed iPhone OS 4.0 to iOS 4.0 at yesterday's WWDC 2010 Keynote address and seeded iOS 4.0 Golden Master to developers of its iPhone Developer program.

It is less than 24 hours since it was released and not surprisingly MuscleNerd of iPhone Dev Team has announced that it is possible to jailbreak iOS 4 using jailbreak tool – Redsn0w.

The Golden Master version means that it is the shipping version of the software that developers must use to develop and submit iPhone apps that are compatible with iOS 4.0.

iPhone Dev Team had recently released Redsnow 0.9.5 Beta 4 to jailbreak iPhone OS 4.0 Beta 4. The beta version of RedSn0w is targeted only at the jailbreak app developers and is not meant for regular iPhone users. The Dev Team had noted that the beta release allows jailbroken app developers to fix "broken" pieces of code in their applications ahead of the public release of iOS 4.0.

MuscleNerd has just tweeted how users who have access to iOS 4.0 GM for iPhone 3G can jailbreak their iPhone 3G:

For those who can legitimately activate to the iPhone3G 4.0GM seed, the “point to previous IPSW” redsn0w trick works and will jailbreak your 4.0GM. The “trick” is to point redsn0w at the 4.0beta4 IPSW instead of 4.0GM (do this after you've updated to 4.0GM and activated through the new iTunes 9.2 on your Mac). Since the carrier unlocks aren't yet supported at 4.0, don't do this if you use yellowsn0w/ultrasn0w/blacksn0w.

For those without legit iPhone3G 4.0GM seed access, please wait until the full public 4.0 release for updates to the jailbreak tools.

Apple has announced that iOS 4 will be released to users on June 21, so Dev team should be releasing tools after June 21. It will be interesting to see if the Dev team can also jailbreak iPhone 4 that was unveiled yesterday.

They had also announced earlier in the week that they’ll be releasing tools to unlock iOS 4.0 and iPhone OS 3.1.3 after the public release of iOS 4.0.

We’ll keep you posted if there are any further updates so stay tuned here at iPhone Hacks or follow us on Twitter or subscribe to our RSS feed.

[via Dev Team]