Redsn0w 0.9.7b6, the untethered iOS 4.2.1 jailbreak is now available for download. Redsn0w 0.9.7b6 fixes Skype issues on iOS device. The beta 6 of RedSn0w 0.9.7 is available for Mac OS X and requires iOS 4.2 beta 3 SHSH blobs.
The next release of RedSn0w 0.9.7 will add “iOS 4.1 Monte” to avoid iOS 4.2 beta 3 piracy. For now, RedSn0w is in beta testing phase.
From iPhone Dev Team blog,
The sixth beta is now available (testers ONLY please!). This version fixes Skype. Please do not pirate the 4.2b3 IPSW! Only those enrolled in the iPhone Developer program have legitimate access to that IPSW using these links (http://pastie.org/1403214) (the links won’t work unless you’re a legit developer currently logged in).
Unlike the last few betas, you can freely run beta6 over beta5 without a problem (but for testing purposes, we’d really like people to try both ways….from stock, and from already jailbroken).
Now that the sandbox, Bluetooth, and Skype issues are fixed, our next priority is porting Monte back to 4.1. We’ll also try to make the Windows version less painfully slow.
Download Redsn0w 0.9.7b6
Download Redsn0w 0.9.7b6 for Mac
Follow the guide linked below to untethered jailbreak iOS 4.2.1 with RedSn0w 0.9.7b6 (Skip Step 3):
Download RedSn0w 0.9.6rc16 (Jailbreaks iOS 4.3.3)