Abstract: Telecommunications method, and system suitable therefor, for establishing a connection with a mobile device, for example a GSM mobile radio telephone, of a participant, who is located in a VPLMN, the calling mobile participant in the VPLMN preparing and sending a short message, for example a USSD message, with the desired destination number, which will be passed on to a callback computer, which establishes a connection between the calling mobile participant and the desired destination number, and a connection being established with a called mobile participant in a VPLMN by a callback computer, whose number is assigned to this called mobile participant in the home location register.

Abstract: The invention relates to a telecommunication method and a system suitable for same for establishing a connection with a mobile station, for example a GSM mobile telephone, of a subscriber located in a visited public land mobile network. According to said method the calling mobile subscriber in the visited public land mobile network prepares a short message, for example an unstructured supplementary service data message with the desired destination number and sends said message, which is then transmitted to a callback computer which establishes a connection between the calling mobile subscriber and the desired destination number. A connection to a called mobile subscriber in a visited public land mobile network is established by a callback computer whose number is assigned to the called mobile subscriber in the home location register.

Abstract: Game system in which a plurality of participants transmit to at least one central play station (3) participant play data for taking part in at least one game (31, 32, 33) in special messages by means of mobile radio devices (2) through the mobile radio network (1). The central play station (3) carries out games according to predefined game rules and transmits central game data in special short messages through the mobile radio network (1) to the mobile radio devices (2) of the participants. The mobile radio devices (2) include a SIM card (21) for the game system, which has a memory, programmed means and a processor in order to show to a participant playing instructions and game results on a display (22) of a mobile radio device (2), and to convey the data to the central play station (3) by means of said special short messages, and to store a p repaid amount which can be used to pay for wagers and to which winnings can be booked.

Abstract: Transaction method for ordering goods or services by mobile telephone, an order for delivery being transmitted to the services provider via a mobile radio network. At least certain order data, in which at least a monetary amount is indicated, are packed in one or more SMS or USSD or e-mail short messages, and are transmitted to a validation platform connected to a short message service center. The indicated monetary amount is deducted from a monetary account of the customer and is transferred to a monetary account of the services provider.