You should do some research before posting, Unlocking an out of the box iphone with firmware 1.1.2 is not possible at this time.
Firmware 1.1.2 can only be unlocked as an upgrade from a lower firmware version.
You can however jailbreak it to run 3rd party apps, but cannot sim unlock. search for a guide.
an Alternative method to use the iphone with a non supported carrier is to buy turbosim or the like. ( this does not simunlock your iphone for use with any carrier )