Abstract: The invention relates to a method for navigation, in particular a method for pedestrian navigation in a building, using a mobile electronic device and a multiplicity of transmitters arranged in the building. In addition, the invention relates to a method for integrating at least one further transmitter in a navigation system, in particular in a pedestrian navigation in a building, in which method the navigation system comprises pre-installed transmitters in addition to the further transmitter(s), at least one electronic device and an application that can run on the electronic device, wherein a floor plan of the building, the locations of the pre-installed transmitters and the identifiers of the pre-installed transmitters are saved in a database of the application.

Abstract: A hands-free electronic device for a vehicle in which the hands-free electronic device is connected to a cell phone so that incoming and/or outgoing communication links can be established by the hands-free electronic device via the cell phone. The hands-free electronic device generates a call number list based on the existence of a call number in the directory of the cell phone and the frequency of use of the call number.