If you've been around the iPhone scene for a while, you've no doubt already heard the story of how George "Geohot" Hotz unlocked the original iPhone for the first time, back in the summer of 2007. If not, The New Yorker, in a far broader profile, tells it again:
In the summer of 2007, Apple released the iPhone, in an exclusive partnership with A.T. & T. George Hotz, a seventeen-year-old from Glen Rock, New Jersey, was a T-Mobile subscriber. He wanted an iPhone, but he also wanted to make calls using his existing network, so he decided to hack the phone.