The mobile device includes a visual input device, for capturing external visual information having real visual background information, and a processing device. The processing device is for associating a selected application with the external visual information, and for executing the selected application based on the external visual information and on user-related input information. The processing device for generating a visual output signal related to at least one virtual visual object in response to the application is further configured to provide the visual output signal to a projector device included within the mobile device such that the projector device will be configured to project said visual output signal related to the at least one virtual visual object onto the visual background, thereby modifying said external visual information.