Mobile phones have changed the way people communicate. In the same way, smart phones, which provide computer-like functions, have changed the way people use their mobile phones. Smart phones differ from ordinary mobile phones in two simple ways: how they are built and what they can do. Currently, the Apple iPhone 3GS and the BlackBerry Bold are arguably two of the best smart phones available in the market. Heres how they match-up against each other: DESIGN The iPhones revolutionary touchscreen design has set the standard for future generations of smart phones. Nokia and Samsung have developed similar designs for their…