ZiPhone is a free and open source utility to hack or jailbreak Apples's iTouch or iPhone, removing all the restrictions imposed by the original firmware, Available in both Windows and Mac flavors, the utility is the fastest and most easy to use method to jailbreak iPhone and iTouch.

Once unlocked you can use your iPhone on any network and install applications of your choice on your device, however keep in mind unlocking your device may void your device warranty.