 Like the BlackBerry 7105t, the BlackBerry 8100 Pearl is 
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.