Like the BlackBerry 7105t, the BlackBerry 8100 Pearl is a departure from the form factor of previous BlackBerry devices. This BlackBerry handset is far more phone-like, and RIM's engineers have managed 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 BlackBerry 8100 Pearl's handset's diminutive size possible. SureType also learns the words you use most often, further enhancing your typing speed. The BlackBerry 8100 Pearl sports a large 240 x 260 screen that supports over 65,000 colors-- plenty of real estate to view your e-mails, Web browser content, messaging sessions, and attachments. The venerable BlackBerry trackwheel has been replaced on this model with an innovative four-way trackball placed below the screen. On the rear of the handheld, you'll find a 1.3-megapixel camera and a self portrait mirror. The handheld's microSD memory card slot is located inside the device, behind the battery. There's also a standard 2.5mm headset jack that can be used with the included headset, as well as a mini-USB port for data connectivity.