Updated RedSn0w 9.7b4 Beta Will be Released Today, Windows Update Is Coming Next
RedSn0w .9.7b4 will be released today to untether your iOS 4.2.1 jailbreak without the need for usbmuxd which is much easier than using the Terminal, Commands, etc.
This untether is a ‘backup plan’ from the iPhone Dev-Team. It requires access to the iOS 4.2b3 firmware and your iOS 4.2b3 SHSH blobs saved.
Currently, the untether is Mac only but the next update will bring Windows support. According to the latest tweet from Dev-Team, they will be expanding the Redsn0w into Windows with the next update (Hopefully)
Today’s beta4 will eliminate separate usbmuxd process (so many more Mac users can use it). After that, expand to Windows.
You can find our instructions on performing the untether here.