A method for enabling use of contents by a user of at least one set top box adapted to receive broadcast TV signals broadcast by a TV network, comprising: establishing an association between at least one identifier of the user in a communications network comprising a mobile telephony network, and at least one identifier of said at least one user's set top box, wherein said at least one identifier of the user in the mobile telephony network comprises a mobile telephony identifier; notifying the user via the mobile telephony network of the availability of the contents ( 501, 503), wherein said notifying includes exploiting said at least one identifier of the user in the mobile telephony network, upon receiving a confirmation by the user ( 527, 529), delivering the contents to the user's set top box ( 541 - 547), wherein said delivering includes identifying the at least one user's set top box exploiting said at least one identifier thereof, characterized in that said at least one identifier of the at least one user's set top box is communicated to the server apparatus by the user's set top box, by having the user's set top box: receive, through a transport stream associated with said broadcast TV signals broadcast by the TV network, and execute an identifier detect application for detecting said identifier of the user's set top box and for communicating the detected identifier of the user's set top box to a server apparatus, connected to a packet data network, particularly the Internet, through a return channel connected to the packet data network and allowing the user's set top box communicate with the server apparatus, and in that said notifying the user comprises sending a notification message to the user exploiting a messaging service of the mobile telephony network, particularly a Short Messaging Service, including in the notification message a message sender identifier comprising a first part adapted to identify the notification message issuing entity, and a second part adapted to identify the available contents object of the notification, said confirmation by the user comprises a reply message to the notification $ message, said reply message being sent exploiting said messaging service of the mobile telephony network. establishing an association between at least one identifier of the user in a communications network comprising a mobile telephony network, and at least one identifier of said at least one user's set top box, wherein said at least one identifier of the user in the mobile telephony network comprises a mobile telephony identifier; notifying the user via the mobile telephony network of the availability of the contents ( 501, 503), wherein said notifying includes exploiting said at least one identifier of the user in the mobile telephony network, upon receiving a confirmation by the user ( 527, 529), delivering the contents to the user's set top box ( 541 - 547), wherein said delivering includes identifying the at least one user's set top box exploiting said at least one identifier thereof, said at least one identifier of the at least one user's set top box is communicated to the server apparatus by the user's set top box, by having the user's set top box: receive, through a transport stream associated with said broadcast TV signals broadcast by the TV network, and execute an identifier detect application for detecting said identifier of the user's set top box and for communicating the detected identifier of the user's set top box to a server apparatus, connected to a packet data network, particularly the Internet, through a return channel connected to the packet data network and allowing the user's set top box communicate with the server apparatus, and in that receive, through a transport stream associated with said broadcast TV signals broadcast by the TV network, and execute an identifier detect application for detecting said identifier of the user's set top box and for communicating the detected identifier of the user's set top box to a server apparatus, connected to a packet data network, particularly the Internet, through a return channel connected to the packet data network and allowing the user's set top box communicate with the server apparatus, said notifying the user comprises sending a notification message to the user exploiting a messaging service of the mobile telephony network, particularly a Short Messaging Service, including in the notification message a message sender identifier comprising a first part adapted to identify the notification message issuing entity, and a second part adapted to identify the available contents object of the notification, said confirmation by the user comprises a reply message to the notification $ message, said reply message being sent exploiting said messaging service of the mobile telephony network.