A method of promoting connectivity in a vehicle between a mobile communication device having a touch screen and a vehicle touch screen installed in the vehicle and connected by wiring to a video source of the vehicle, the video source of the vehicle being a built-in media computer of the vehicle, the method comprising: connecting a controller to the mobile communication device and to the vehicle touch screen ; receiving video signal of a current screen video image shown on the touch screen of the mobile communication device and transmitting the current video image via the controller to the vehicle touch screen , causing a corresponding video image of the current screen video image to be displayed on the vehicle touch screen , receiving by the controller a signal indicative of a touch action that was performed on the vehicle touch screen, and causing the mobile communication device to respond as if a touch action corresponding to the touch action that was performed on the vehicle touch screen was performed on the touch screen of the mobile communication device, wherein the method further comprises connecting a switching unit to the wiring that links the video source to the vehicle touch screen , wherein the switching unit is configured to switch a live video link to the vehicle touch screen between the mobile communication device and the video source of the vehicle; configuring the controller to operate the switching unit, and providing the live video link to the vehicle touch screen concurrently from the mobile communication device and the video source of the vehicle, using the switching unit , wherein connecting the switching unit comprises severing the wiring and connecting the switching unit between the video source and the vehicle touch screen . connecting a controller to the mobile communication device and to the vehicle touch screen ; receiving video signal of a current screen video image shown on the touch screen of the mobile communication device and transmitting the current video image via the controller to the vehicle touch screen , causing a corresponding video image of the current screen video image to be displayed on the vehicle touch screen , receiving by the controller a signal indicative of a touch action that was performed on the vehicle touch screen, and causing the mobile communication device to respond as if a touch action corresponding to the touch action that was performed on the vehicle touch screen was performed on the touch screen of the mobile communication device, wherein the method further comprises connecting a switching unit to the wiring that links the video source to the vehicle touch screen , wherein the switching unit is configured to switch a live video link to the vehicle touch screen between the mobile communication device and the video source of the vehicle; configuring the controller to operate the switching unit, and providing the live video link to the vehicle touch screen concurrently from the mobile communication device and the video source of the vehicle, using the switching unit , wherein connecting the switching unit comprises severing the wiring and connecting the switching unit between the video source and the vehicle touch screen . connecting a switching unit to the wiring that links the video source to the vehicle touch screen , wherein the switching unit is configured to switch a live video link to the vehicle touch screen between the mobile communication device and the video source of the vehicle; configuring the controller to operate the switching unit, and providing the live video link to the vehicle touch screen concurrently from the mobile communication device and the video source of the vehicle, using the switching unit , wherein connecting the switching unit comprises severing the wiring and connecting the switching unit between the video source and the vehicle touch screen . <EOS>