this video bother me a lot because i couldn't find how to do this hack. This video state that this guy hacked the 3G iphone by changing the carrier tag. Please take a look and tell me if you can find the source on how he did it on his 3G iphone. thank guys 

http://youtube.com/watch?v=2qCt7I7l5vg
http://youtube.com/watch?v=2qCt7I7l5vg