iPhone Dev Team had released Redsn0w 0.9.7b1 that implements the “backup plan” for iOS 4.2.1 untethered jailbreak for iPhone 4,iPad and iPod touch 4G, which is currently meant only for beta testers.
They are working hard to fix all the issues to get it ready for the general public. After releasing Redsn0w 0.9.7b2 to fix native app crashes, they have released another version – Redsn0w 0.9.7b3 to fix bugs related to non-GUI programs such as Facetime, Winterboard themes, and embedded videos in iTunes.
iPhone Dev Team has updated their blog post to provide more details about the new beta version:
The third beta is now available (testers ONLY please!). This version extends the fix made in beta2 over to the non-GUI programs too (like the daemons that handle media content). That should cover things like Facetime, Winterboard themes, and embedded videos in iTunes. If you had trouble using the usbmuxd in previous betas, please wait until we incorporate that into redsn0w itself (i.e. don’t bother trying this beta3, just wait for the integration).
We would like to again reiterate that Redsn0w 0.9.7 beta is still not meant for general public so stay away until all the issues are resolved if you are not interested in being a beta tester. Redsn0w 0.9.7 beta is currently available only for Mac users, Windows users will have to wait for public release of Redsn0w 0.9.7.
If you plan to beta test it then download Redsn0w 0.9.7b3 for Mac using this link (Dev Team has advised beta testers to test it after a fresh restore). Please don’t forget to let us know how it goes in the comments and also provide your feedback on Dev Team’s blog, which will help them to iron out the issues before the public release.