An emergency call system is presented, which when an emergency call is initiated, instantaneously retrieves and transmits an identification key using an established communication link with a communication network. Therefore, the emergency call system does not need to unregister from the established communication link and establish a new communication link in order to transmit the identification key. The system includes an emergency call device, which includes a mobile communication device for communicating with the communication network, a regular-use data module storing non-emergency use information, an emergency data module storing emergency use information, such as an identification key, a data retrieving module for retrieving information from the emergency and/or regular-use data modules. When the emergency call device is implemented in a vehicle, the data retrieving module for the regular-use and/or emergency data modules may be in communication with a multimedia device via a local communication network.