Typically when you purchase a cell phone, the company that sold you the phone (ex: AT&T) 'locked' the phone before you bought it, so you can only use it on their network. This means that you can't use your phone if on any other network, even if you change the SIM (which is an abbreviation for Subscriber Identity Module) card.

Cell Phones Hacks with Kevin Rose

New Toshiba TG-02 Cell Phone Upcoming: Recently, the news from the Wifi-Alliance shows that Toshiba will launch a new cell phone: TG-02. Toshiba TG-02 use of

New Motorola W766 Cell Phone Exposure: Recently, a new Motorola W766 cell phone has been exposed, which is the upgrade edition of Motorola W755. Motorola

The Toronto Star: After spending tens of thousands of dollars creating and testing an online calculator designed to help consumers select their ideal wireless plan, Industry Minister Tony Clement killed the project weeks before it was scheduled to launch.