ZiPhone

Zibri's tool to unlock, jailbreak, and activate the iPhone and iPod touch (1st generation) on iPhone OS 1.1.3-1.1.5. It was found at ziphone.org, but the domain was sold off by Zibri.

It makes use of the Ramdisk Hack and uses geohot's BL4.6 exploit to downgrade the baseband bootloader and subsequently unlock the baseband.