RedSn0w 0.9.11b4: supports tethered jailbreak of A4 Devices on iOS 5.1.1
The iPhone Dev-Team released RedSn0w 0.9.11b4 with support for the tethered jailbreak of A4 devices on iOS 5.1.1 –
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 can download RedSn0w 0.9.11b4
iOS 5.1.1 jailbreak step-by-step tutorials are available