The Dash 3G is slightly slimmer at 4.5 inches tall by 2.4 inches wide by 0.4 inch thick , and is comfortable to hold while on a phone call or typing messages. The handset will also easily slip into a pants pocket and won't weigh you down at 4.2 ounces.T-Mobile Dash 3G comes with a trackball navigator, which allows for smoother scrolling and navigation compared with the traditional d-pad found on the Sprint Snap. Surrounding the trackball are the Talk and End buttons, two soft keys, a Home shortcut, and back button. The single-row layout of these controls is spacious and clean, blending in nicely with the rest of the phone's design.