Jailbreak iOS 4.3.4 with Redsn0w 0.9.8b3 (Tethered)
The recently released iOS 4.3.4 update has been jailbroken by a new version of redsn0w. Most iOS 4.3.4 devices are supported including the iPhone 4 GSM & CDMA, iPod touch 3rd and 4th gen, and iPad 1. For now, iPad 2 owners must stay on iOS 4.3.3 and continue to use JailbreakMe 3 as it is the only option for that hardware.
This is a somewhat typical Redsn0w jailbreak, with the main limitation being it is tethered only. Be sure you understand completely what a tethered jailbreak means and it’s limitations, but in short, anytime you reboot your iOS device it will have to be connected to a computer and booted with the assistance of the Redsn0w application.
Download Redsn0w 0.9.8b3
As usual, Mac and Windows versions are available:
The iPhone Dev Team suggests most users stay on iOS 4.3.3 so that they can continue with an untethered jailbreak. Remember, the only change in iOS 4.3.4 was the fix for the PDF hole that was utilized by jailbreakme 3, but that hole can be patched independently through Cydia or by upgrading iOS itself.
Other than the tether, the process of using this version of redsn0w remains the same as the prior version. If you need assistance, you can follow a walkthrough for 4.3.3.