Jailbreaking your iPhone gives you a lot more options as far as purchasing and using apps. So you want to know how to jailbreak your iPhone 4? It is a pretty simple process using a program called the Spirit Jailbreak tool. But before you begin go ahead and backup all your photos and other files stored on your iPhone to the computer. Then sync the iPhone to be sure that everything is up to date.
While the iPhone is still connected to the computer open the Spirit Jailbreak tool. You should see a message that informs you that the device is connected to the computer. Once you see this notification, click on the “jailbreak” button. It should only take a short time for the program to run and then you will see a notification that the restore has been completed. The iPhone will restart on its own and the screen will display the little pinwheel that is spinning and then it will show a colorful screen that has a progress bar in the center.
You should now see a new icon on the home screen. It is called Cydia. It is simply another app store. Your original app store is still available to use this one is in addition to and gives you a wider variety of apps that are from a third-party source.