Abstract: The invention concerns a method of operating a communication device with a transceiver 12, where at least two SIM cards 15.1, 15.2 are provided and one of these SIM cards 15.1 is logged-in. As soon as one of the SIM cards 15.1 is logged-in, this manner of operating provides that the other SIM card 15.2 can only be logged-in when the other SIM card 15.1 is no longer active. For example if the SIM card 15.1 is the one used to establish a normal telephone connection, and the SIM card 15.2 is the one which is used to update a navigation system for example, no street index adaptation or traffic jam messages can be transmitted if the SIM card 15.1 is active, i.e. is logged into the network. To avoid the corresponding disadvantages, it is proposed that the logged-in SIM card 15.1 uses information from the remaining not logged-in SIM card(s) 15.2. This ensures that in order to use functions which are connected to the not logged-in SIM card(s) 15.2, the call number of the logged-in SIM card 15.

Abstract: This invention relates to radio engineering, and in particular it concerns a method of establishing contact between users. The method consists in that, in a portable computerized device combined with a radio transceiver, data comprising an array of formed information, which is, upon conversion, assigned a personal code, is inputted into the memory. Then, this code is transmitted in the form of pulsed radio signals through the propagation medium for reception thereof by other devices operating within the range of the first device. Upon reception of pulsed code radio signals transmitted by other devices, the codes received are compared with the personal code, and when one of the codes received is found to coincide with the personal code, the received data corresponding to that code is decoded and outputted for visual or audio perception of the information array corresponding to that code.