Jailbreak and Unlock Instructions
If you are unable to download the file from the official GreenPoison website, you can use the links provided below as an alternative:
GreenPoison for Windows
GreenPoison for Mac
Step 2: After downloading the latest version of GreenPoison for Windows or Mac, double click the file to launch the application. When the GreenPoison application starts, you should notice “Prepare to Jailbreak (DFU)" button. Press this button to continue with the process.
Step 3: You should now see a list of steps along with a timer count that you need to follow in order to put your iPhone into DFU mode.
If you are unable to put your iPhone into DFU mode within the allotted time period, you have to follow this step again. Alternatively, you can follow the tutorial mentioned below before following the steps listed in the application.
Force iPhone in DFU mode?
This way you can easily put your iPhone in DFU mode and when GreenPoison detects your iPhone in DFU mode after the timer count is over, you can directly press the Ready to Jailbreak button.
Step 4: After GreenPoison detects your iPhone in DFU mode, you should see a button labeled “Ready to Jailbreak". Press this button to continue with the jailbreak process. You should now notice a green bar that indicates the progress of your iPhone jailbreaking process.
Step 5: After GreenPoison jailbreaks your device, you should see a “Quit" button. Press the “Quit" button to exit the application. After your iPhone reboots, you should see a Loader icon on your iPhone SpringBoard.
Step 6: Tap the Loader icon. After you have clicked the Loader icon, you should notice a Cydia button. Press the Cydia button to begin installing Cydia on your iPhone. Cydia will now be downloaded and installed on your iPhone.
Once the Cydia installation is complete, you should notice a button to remove the Loader.app icon from your SpringBoard. Click that button and restart your iPhone.
You now have a jailbroken iPhone. In order to unlock your iPhone for use on any network service provider of your choice, follow this tutorial:
How to Unlock iPhone 3G, iPhone 3GS and iPhone 4