The invention relates to a method, server and device arrangement for transmitting high-class multimedia messages of a mass event. When this method is utilized, the data transfer capacity of the cell of a cellular network serving the participants of the mass event need not be increased so that it would correspond to the capacity of the multimedia messages to be transmitted. In a method according to the invention, the cell that serves the mass event mainly transmits only text messages by which the multimedia messages to be sent from a multimedia server to some other terminal devices are defined.