The iPhone Dev-Team is getting close to releasing the final version of its flagship untethered jailbreak for all iOS 4.2.1 devices, redsn0w 0.9.7. The fourth beta of the jailbreak will be released to beta testers via Twitter today, and according to the developers, the new version squashes most of the major bugs identified so far, such as video playback and FaceTime issues. The beta 4 also eliminates the need of the USB mutiplex daemon (usbmuxd) to perform the jailbreak, an external library required with previous beta versions of the jailbreak (click here for more details).
If you want to give redsn0w 0.9.7b4 a try, simply follow the Dev Team via Twitter. Note that the software should be directly available on Google sites later today. If the beta 4 shows no significant bugs, the official version of redsn0w 0.9.7 for OS X could be packaged and released within a week or so. Meanwhile, Windows users will have to wait a bit longer, as the Dev Team is focused on finalizing the Mac version for now. Even though jailbreaking is considered legal, always keep in mind that Apple sees it as a warranty-voiding act, so do it at your own risk. Please do not use jailbreaks to install copyrighted/paid content you haven’t purchased yourself. [UPDATE] The beta 4 is now available on Google sites.