Good news for those of you with A4 devices that recently updated to iOS 5.1.1. The Dev Team has just released RedSn0w 0.9.11b4 with a handful of improvements, including full tethered jailbreak support for the new firmware.

The Team has certainly been busy over the weekend, as this is the fourth iteration of the 0.9.11 version of the software, which was just released on Friday

RedSn0w 0.9.11 was updated to b4 before we even noticed there was a b3, so we’ve included both changelogs:

“Version 0.9.11b3 should fix the spurious “Restore failed” messages people were sometimes getting, and it behaves better with nearby devices that have wifi syncing enabled!

Version 0.9.11b4 completes the tethered JB support for 5.1.1 on A4 devices and earlier, including proper “Stitching” and “Custom” creation of NO_BB IPSWs.”

You should only need to download the latest version of RedSn0w if you are looking to jailbreak your A4 device on iOS 5.1.1, or have been having problems downgrading your A5 device’s firmware. Otherwise, previous versions should suffice.

As always, you can find the RedSn0w update on our Downloads page. And if you need some help using the software, we have step-by-step tutorials on how to both downgrade and jailbreak your device using the utility.