Method to obtain the cost of transmitting a set of data via a cellular packet radiocommunication network

Method to obtain the cost of transmitting a set of data from a transmitting means (3, 16) to a receiving means (2) through a radio network mobile packet (4), the method comprising creating and sent with the data set itself a data item, called a ticket (19, 23), used to determine the volume and / or the value of said set of data transmitted wherein the method comprises: - translating a data set a set of a plurality of packet radio network mobile packet - the introduction into the set of a plurality of packets of an additional package that is the ticket, - the determination by the receiving environment, volume and / or the value of said set of a plurality of packets transmitted from the ticket received indicated that volume coming and / or the value received by the ticket.