By using an exploit found with iPhone’s ICCID (go to Settings, General, About), you can unlock it for free. Follow the instructions below: Requirements: Jailbroken iPhone that is not blacklisted. iPhone 3GS baseband 5.14.02, 5.15.04, 5.16.02 and 5.16.05. iPhone 4 on baseband 4.11.08 and 4.12.01. Computer with a fully working internet connection Latest version of iTunes Original carrier information...