Teenager George Hotz, aka GeoHot, the original iPhone unlocker is back. In a post to his personal blog he states that he has successfully unlocked a 1.1.2 firmware and bootloader 4.6 iPhone. Better yet, he posts the not-for-dummies version of the instructions to downgrade the bootloader to version 3.9 in preparation for running AnySim. We haven't tried this ourselves so remember, as GeoHot himself states, this hardware method "could brick your iPhone." You haven't upgraded to 1.1.3 already have you? If so, you're stuck with AT&T.
Source:→ Engadget Mobile
iPhone, Firmware, Unlock