Disclosed are methods and devices for controlling particular user interface functions of a mobile communication device when the device is used by a driver of a moving vehicle. A disclosed method includes determining if the mobile communication device is within a predetermined proximity to the driver's seat. The method further includes determining if the mobile communication device is moving at a predetermined speed or acceleration. When those conditions are met, the method includes substantially disabling particular user interface functions of the mobile communication device. Particular user interface functions that may be disabled or inhibited may include, for example, at least one of a display function, a keypad function or a touchscreen function. In this way, a driver may not be able to utilize one or more particular user interface functions while driving.