Device for mobile application

The invention relates to a device (101, 301, 401) for mobile use, comprising a frequency spectrum generator (102, 302) for generating a frequency spectrum of at a current location of the device (101, 301, 401) existing radio waves, and a classifier (103 , 303) for classifying the frequency spectrum in such a way that the frequency spectrum of a (at least two classes 106, 107; 306, 307) is assigned.