The process for carrying out the Jailbreak is not complicated, just as with previous versions, the only thing to keep in mind is that you should select the IOS firmware 5.1 manually.
That is, the process would be to upgrade to iPhone OS 5.1.1. Then we open RedSn0w and click onSelect IPSW and select the previous version and ready. Within seconds we will have our IOS devices with version 5.1.1 and Jailbreak done.
You will need your 5.1 firmware for the device that you want to jailbreak, as RedSn0w currently doesn’t recognize iOS 5.1.1. This is for A4 devices only.
Step 1: Download the latest version of RedSn0w 0.9.10b8b from our download page.
Step 2: Connect your device to your computer, place your device into DFU mode, and run RedSn0w.
Step 3: Go to Extras > Select IPSW > and point to your iOS 5.1 firmware for this device.
Step 4: Once RedSn0w successfully identifies the 5.1 firmware, head back to the main page of RedSn0w and click Jailbreak.
Step 5: Once it identifies the build, click Next where it asks you to install Cydia.
Step 6: Cydia will be installed, and your device will reboot. Upon reboot, place the device back into DFU mode.
Step 7: Perform a tethered boot via RedSn0w by going back to the Extras page and clicking Just Boot.
Step 8: Your device will reboot, and you will have a usable Cydia icon on your Home screen.
Note: This is a tethered iOS 5.1.1 jailbreak. Once RedSn0w is updated for iOS 5.1.1 you will no longer have to follow step 3.
Remember this is only for iOS 5.1 jailbreakable devices. Meaning it won’t work with the iPad 2, the iPhone 4S, or the new iP
Remember that you have done Tethered Jailbreak forces us to rely on a team with Redsn0w installed to turn the device when it shuts down for lack of battery or have done so voluntarily.
Thanks to all who have been warned!
Via: Blog iDownload