Want to untethered jailbreak iOS 4.2.1 firmware on your iPhone 4 / 3Gs / 3G? Then use RedSn0w which will get updated to version 0.9.7 beta 5. RedSn0w 0.9.7b5 will soon be released by iPhone Dev Team. The last beta version of Redsn0w 0.9.7b4 eliminated the need of seperate Usbmux process making it easier for OS X users to untethered jailbreak iOS 4.2.1 on their iPhone 4 & iPod touch 4G. However it still requires iOS 4.2 beta 3 firmware files & saved iOS 4.2 b3 hashes.
Luckily, some leaked info told us that iPhone dev Team will soon release RedSn0w 0.9.7b5 which will support untethered jailbreak of iOS 4.2.1 via Windows OS. The information was leaked from Musclenerd’s tweet:

Where to download? Just wait and keep updated with us to get more update about this topic (Follow us on Twitter). Also, you can check out other information and download links of RedSn0w 0.9.7b5 for Windows and Mac after jump below.

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