Aspects of the innovations herein relates to a housing having a housing wall comprising a polymer including electrically conductive particles, wherein an inner chamber is provided in the housing, and is formed and enclosed by the housing wall and into which a mobile telephone may be inserted. In some implementations, the housing wall may be designed to attenuate a mobile radio signal of the mobile telephone, such as by ≧3 dB, as compared to unobstructed propagation, on the side of the housing wall facing away from the inner chamber.