Check it out.
"October 10th, 2007:
Worlds First Unlock for iPhone 1.1.1 / 04.01.13_G Firmware
Our sincere congratulations, to the iPhone/ iTouch Dev Team for their brilliant work in finding an ingenious way to jailbreak the 1.1.1 system. This exciting news means we are now able to gladly welcome all SIMFREE unlocked phone owners to UPGRADE to 1.1.1 if they so wish
Further to this, we are very proud to announce, (after some very difficult and lengthy hardware hackery), we were able to retrieve the necessary info to create the world first 1.1.1 unlock solution. We have now tested SimFree v1.6 with phones that have the new Baseband version 04.01.13_G with full success. This now means that SimFree v1.6 release, is now capable of completely restoring/repairing software unlocked "bricked" iPhone. Those of you wishing to repair your phone, please read the following steps. "