iUnlock Reloaded developed by iPhoneDev team is now automatic (not a graphical user interface yet). What you need to do in this new version is copy all 3 files to your iPhone, ssh in and execute iUnlock_Reloaded and you are done. Your iPhone is free and can be used with any GSM carrier. The GUI (graphical user interface) version is still not ready but if you can wait few more days that will be released too.
If you don’t want to wait,
Download 1
Download 2