5. In Installer add http://modmyi.com/installer.xml to your installer source and then Install anySIM 1.2.1u from the installer. Reboot iPhone!
6. Tap on Setting then put the iPhone in Airplane Mode!!! Run AnySIM1.2.1u! After its completed, go to Settings>Airplane Mode set to OFF, now you will get a signal.
If you're outside US, SMS and Phone is not working. To fix it install iWorld via Installer, choose your country. Now you're DONE! Enjoy a free iPhone with 1.1.2 firmware