Methods, systems, and key fob apparatuses for facilitating hands free mobile communications from within an automotive vehicle are provided. The apparatus includes a key fob with a housing and a SIM associated with the housing. The SIM is operative to identify a subscriber to a mobile telephone network when interfaced with the mobile telephone network. The apparatus may further include a key integrated with the key fob and operatively associated with the SIM. The key is operative to initiate the start of an engine of the automotive vehicle and interface the SIM with a mobile telephone, such as a GSM phone, integrated with the automotive vehicle. Thus, when the key is inserted into an ignition switch operatively associated with a SIM reader, the SIM identifies a subscriber to the mobile telephone network.