This Guide is for iPhone 3G and Redsn0w version 0.7, 0.7.1 and 0.7.2
It also applies to iPhone 3GS and Redsn0w version 0.8 (the steps are the same).
The iPhone Dev Team released updated version of PwnageTool for Mac users and Redsn0w for both Mac and Windows users to jailbreak iPhone 3G running iPhone OS 3.0.
Here is our step-by-step guide to jailbreak iPhone 3G running iPhone OS 3.0 using Redsn0w for Windows users. We will publish one for Mac users shortly.
An important preparatory step before jailbreaking your iPhone 3G is to take a backup of your iPhone. Please refer to this article for more details.
As with any hack, please proceed with caution as jailbreaking your iPhone could void it’s warranty.
Here are the step-by-step instructions on how to jailbreak your iPhone 3G in order to use the iPhone OS 3.0 using redsn0w for Windows
Step 1: Create a folder on your desktop and name it Pwnage.
Step 2: Now download redsn0w from here and put it inside the Pwnage folder that you just created.
Also, download the latest 3.0 firmware from the location given below and put it in the same Pwnage folder.
iPhone OS 3.0 – iPhone1,2_3.0_7A341_Restore
Step 3: Extract the redsn0w zip file to the Pwnage folder.
Step 4: Connect your iPhone 3G to the computer and then launch iTunes.
Step 5: In the iTunes, select your iPhone from the list of devices displayed on the left. Press the shift button on your computer and then click the Restore button on iTunes.
(Restore is preferred as it won’t create any wasted space on your iPhone)
Step 6: Navigate to the Pwnage folder on your desktop and select the firmware ipsw. Click the Open button to continue.
Step 7: Once iTunes has finished updating your iPhone to the desired firmware, launch redsnw0w.exe from the Pwnage folder on your desktop.
Step 8: Once redsn0w launches, click the Browse button.
Step 9: Select the firmware ipsw (that you placed in the Pwnage folder on our desktop) and then click Open.
Step 10: Once the firmware has been verified, click the Next button in order to continue.
Step 11: Make sure the ‘Install Cydia’ check box is selected and click the Next button.
Step 12: Make sure that your iPhone is plugged into the computer, and it’s switched OFF. Now click on the Next button.
Step 13: redsn0w will now guide you through the steps to get into DFU mode.
Hold down both the Home button and the Power button for 10 seconds.
Now, Release the Power button and continue holding the Home button until redsn0w detects the device.
Step 14: You will see a message that states that your iPhone is being jailbroken. Your iPhone will then reboot.
Step 15: redsn0w will begin uploading the new RAM Disk.
Once this activity is completed you will be see the message ‘Done!’, which means that your iPhone 3G has been jailbroken.
Step 16: Click the Finish button.
And when your iPhone finishes rebooting (approx. 5 minutes). It will be jailbroken with Cydia available on your iPhone’s home screen so that you can install jailbreak apps.