Known as one of the leading brands on the computer market, Dell has expanded its product line to include mobile phones. Instead of offering simple cell phones, Dell introduced advanced smartphones such as the Venue Pro and Venue models. The large 4.1 inch touch screen integrates AMOLED technology for high quality displays. Staying true to its computer roots, the Dell Venue Pro smart phones run on Windows mobile operating system platforms. By contrast, the Dell Venue version is an Android powered device. Despite the touch screen, the Dell mobile phones offer full size sliding QWERTY keyboards for the ultimate comfort in typing text.