Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. The jaw handles each have a handle portion and a clamping portion. The valve insert maintains form while permitting repeated removal and insertion, in addition to washing and long-term use, by providing that the stabilizing core has a rigidity greater than that of the sheath formed over the stabilizing core. The method is characterized in that the screw which is screwed into the hollow attachment element penetrates the sheet metal part and forms or reforms a thread in the sheet metal part. A transaction security code is then sent to that cell phone.