It is a full-featured PDA and worldphone, allowing users to take advantage of the robust capabilities of the Windows Mobile 5.0 operating system, while having a single device that encourages users to be productive during work and to enjoy their personal time. As a 3G device, the Samsung BlackJack allows for simultaneous voice and data, which is a key differentiator over competitive EV-DO products. The Samsung BlackJack is a great device for customers looking for a PDA that has it all in a nice compact design.