A new version of RedSn0w has been released by iPhone Dev Team which will allows the developers to jailbreak iOS 5.0b1. iOS 5 beta was released at WWDC 2011 to developers.
The following devices that are supported by RedSn0w 0.9.8b1 are iPod touch 3G, iPod touch 4G, iPad 1, iPhone3GS, iPhone4 (GSM) and iPhone4 (CDMA).
According to blog.iphone-dev:
UNLOCKERS AND THOSE PRESERVING THEIR UNLOCKABLE BASEBANDS SHOULD STAY FAR AWAY FROM THIS! You will very likely lose your unlockable baseband if you try to install iOS 5.
THIS JAILBREAK IS INTENDED ONLY FOR DEVELOPERS OF JAILBROKEN APPS! There are just too many broken components (Apple’s official apps, 3rd-party App Store apps, Cydia apps, MobileSubstrate apps, etc) for this to be useful to anyone but those truly looking to fix bugs in their iOS 5 jailbroken apps. (Seriously!)
THIS REDSN0W WILL NOT HACTIVATE 5.0b1! You need to be an iOS developer with a registered UDID to get past all the new activation screens. PLEASE DON’T PIRATE APPLE SOFTWARE! Only registered devs with Macs can develop iOS applications, and only those people will have legitimate access to the beta IPSWs.
THIS IS A TETHERED JAILBREAK ONLY! No new exploits are being exposed with this jailbreak (it uses geohot’s limera1n bootrom exploit), but that comes at a cost. You will need to use redsn0w to “Just boot tethered now” to be able to use many things, including Cydia and Safari. If you see a white icon for Cydia, or if Cydia or Safari crash when you open them, it’s because you didn’t boot tethered.
IF YOU HAVE THE 06.15 BASEBAND ON YOUR 3GS…this redsn0w will get you past the iTunes restore error you’ll get when using the stock IPSW (nobody other than those with the 06.15 baseband should be going anywhere near the stock IPSW!).
iPhone Dev Team also suggest that redsn0w will very likely be able to use on future iOS5 betas, by pointing to redsn0w at the 5.0b1 IPSW.
You can download redsn0w_mac_0.9.8b1 from here (Link)
[ Via blog.iphone-dev ]