Speech recognition in a vehicle through an extrinsic device includes detecting, via the vehicle, a presence of a mobile communications device that is configured with a speech recognition component. A vehicle processor encodes data lists stored in the vehicle and transmits the data lists and a vehicle identifier to the mobile communications device. In response to receiving a request to initiate a voice recognition session, the vehicle transmits the request and the vehicle identifier to the mobile communications device that causes activation of the speech recognition component. The mobile communications device retrieves the data lists via the identifier. In response to a voice command received by the speech recognition component, the speech recognition component interprets the voice command, determines an action by evaluating the voice command in view of the data lists, and transmits an instruction to the vehicle processor directing the vehicle to implement the action.