A 17-year-old from Glen Rock, N.J., says he has "unlocked" the iPhone, finding a way to get around the device's limitations and permit it to be used not only on AT&T's cell phone network but also on T-Mobile's network and all around the world.

 

IPhone is the most anticipated mobile gadget of the year launched in May; and known for revolutionary phone. The Cupertino technology company said it plans to sell 1 million iPhones by the end of September.

 

However, the iPhone has come with a catch. Because of a revenue-sharing agreement between Apple and AT&T, the iPhone functions only on AT&T's network and demand a two-year subscription.

 

Hackers have consumed the bulk of the summer undertake that challenge.

 

Hotz said it took him nearly 500 hours - about eight hours a day - to discover how to make calls on his iPhone through T-Mobile. "It wasn't to be rich," Hotz said. "I wanted to use it with T-Mobile."

 

Holz published step-by-step instructions on his blog at iphonejtag.blogspot.com.