Content data available in a server is downloaded to portable communicating objects via a radio communication network during a data downloading campaign initiated by a portable communicating object upon transmission of a request of content availability to the server when at least one request transmission triggering element fulfills a rule stored in the portable communicating object. Upon reception of the content availability request, one of the devices including the server and the portable communicating object determines whether the content data are available for the portable communicating object so as to transmit the same thereto.