BlackBerry Pearl 8120 Phone, Black/Emerald (T-Mobile). Weighing just 3.21 ounces and just 0.55 inches thin, the Pearl 8120 manages to fit a QWERTY keyboard onto the handset's slim frame.

Each button on the keyboard shares two letters and the unit automatically determines which letter is the intended one based on what it predicts you are trying to spell. This unique predictive text technology, known as SureType, makes the Pearl 8120's diminutive size possible. SureType also learns the words you use most often, further enhancing your typing speed.