George Francis Hotz is known for being among the group of people who first unlocked the iPhone to work on carriers other than those which Apple officially supported e.g. AT&T. He went to release jailbreaking tools like purplera1n, blackra1n, blacksn0w, a hack the PS3 and recently Limera1n which jailbreaks iOS 4.1.
Earlier today, we were tipped off about Limesn0w unlock which was said to have been worked on by Geohot for the new 05.14.02 and 2.10.04 basebands on iOS 4.1 for iPhone 4 and iPhone 3GS. We didn’t post it because the videos and pictures floating around the Internet were too obviously fake.