If you have update your iPhone or iPod touch to iOS 5.1 and want to JailBreak iOS 5.1 then you have to wait for some more week for the Untether jailbreak of your iPhone or iPod touch but you are still able to Jailbreak your iPhone or iPod Touch but it will be a Tether jailbreak means every time when you switch your device off you have to take the boot from “Redsn0w->extra->Just boot” from the Redsn0w application in your computer.
Step-By-Step Guide to Jailbreak iOS 5.1 for iPhone 4/iPhone 3GS/ iPod Touch
iPhone Dev team has just released a new version of Redsn0w – Redsn0w 0.9.10b6 that supports iPhone 4, iPhone 3GS, iPad 1 and 3rd-generation and 4th generation iPod touch.
Step 1: Download Redsn0w for Windows from this link
Redsn0w for Mac from this link.
Step 2: Double click the Redsn0w zip file and extract the application to the Redsn0w folder.
Step-3: Save the application in a folder named “Redsn0w” on your desktop.
Step -4: Run the Redsn0w.exe in Windows XP compatibility mode (right-click on the Redsn0w exe and select Properties, then select the Compatibility tab and select Run this program in compatibility mode for Windows XP). If you have windows XP then just double click on the Redsn0w.exe.
Step 5: You will now be asked to plug your iPhone to the computer and switch it OFF. Follow the instructions and click on ‘Next’ to move to the next screen.
Step 6: You will now need to put your iPhone into the DFU mode. Redsn0w will take you through the necessary steps:
(a) Hold the Power button on iPhone down for 3 seconds
(b) Now simultaneously hold the Home button and keep the two buttons pressed for 10 seconds
(c) Now release the Power button while keeping the Home button pressed until Redsn0w detects the device
Step 7: Your iPhone should reboot now. Do not forget to release the Home button.
Step 8: Redsn0w will now start preparing the jailbreak data.
Step 9: You will now be prompted to select the jailbreak options you would like. Make sure Cydia is selected and select ‘Next’ to continue.(wait appox 5-10 min.)
Step 10: You will now be notified once the jailbreaking process is complete. Click on the ‘Finish’ button to exit the application.
Step-11: your phone will reboot and if you find Cydia in it means your phone has Jailbreak successfully but you will find your Cydia is not running and it icon is totally white in color.
Step-12: Now switch your phone off and connect it to Redsn0w again and go to “Redsn0wextraJust boot” again Redsn0w will ask you to put your phone in DFU mode. Follow these steps
(a) Hold the Power button on iPhone down for 3 seconds
(b) Now simultaneously hold the Home button and keep the two buttons pressed for 10 seconds
(c) Now release the Power button while keeping the Home button pressed until Redsn0w detects the device
Now you device will boot again and your Cydia will work properly.
Note:
1- This is a Thether jailbreak so you have to follow step-12 every time you switch off your device and wants to turn it on.
2- Please note that jailbreaking your iPhone may void your warranty so proceed with caution and at your own risk.
3- Please do not forget to backup your iPhone before you proceed. You can refer to this post for instructions on how to backup your iPhone.
4- Please ensure you are running latest version of iTunes i.e. iTunes 10.5 or later.
5- iBooks won’t work if you jailbreak your iPod touch using Redsn0w 0.9.10.b6. Dev team is working hard to fix the issue.
6- Please don’t use this guide if you want to preserve your iPhone’s baseband.