A method of communication between at least one base station (1.1, 1.2) of a mobile-radio network, preferably of the LTE or 5G type, and at least one terminal located in a confined space, said method comprising: a) receiving (E1) by at least one television aerial external to said confined space, in a UHF frequency band, in particular between 450 MHz and 960 MHz, a plurality of radiofrequency signals comprising, on the one hand, at least one mobile-radio signal (S12) emitted by said at least one base station (1.1, 1.2) of the mobile-radio network, preferably in accordance with the LTE or 5G standard, said plurality of radiofrequency signals comprising on the other hand at least one television signal (S82); b) transmitting (E2) said plurality of radiofrequency signals (S12, S82), via a wired communication link , between said at least one external television aerial and a processing module (6; 6'; 6"; 61; 62; 63) of said radiofrequency signals located within said confined space; c) extracting (E3) said at least one mobile-radio signal (S12) by said processing module; d) broadcasting (E10) said at least one mobile-radio signal (S12) extracted by said processing module within the confined space; and e) receiving (E12) by the terminal said broadcast signal, said method being characterised in that the processing module comprises : - a radio frequency router ; - at least one wireless access point connected to said router; and - a mobile radio modem adapted to communicate on the one hand with the mobile radio network and on the other hand with the router and said at least one wireless access point , said mobile radio modem being designed to receive at least one physical SIM card or a virtual SIM card known as an e-SIM that can be remotely reprogrammed. a) receiving (E1) by at least one television aerial external to said confined space, in a UHF frequency band, in particular between 450 MHz and 960 MHz, a plurality of radiofrequency signals comprising, on the one hand, at least one mobile-radio signal (S12) emitted by said at least one base station (1.1, 1.2) of the mobile-radio network, preferably in accordance with the LTE or 5G standard, said plurality of radiofrequency signals comprising on the other hand at least one television signal (S82); b) transmitting (E2) said plurality of radiofrequency signals (S12, S82), via a wired communication link , between said at least one external television aerial and a processing module (6; 6'; 6"; 61; 62; 63) of said radiofrequency signals located within said confined space; c) extracting (E3) said at least one mobile-radio signal (S12) by said processing module; d) broadcasting (E10) said at least one mobile-radio signal (S12) extracted by said processing module within the confined space; and e) receiving (E12) by the terminal said broadcast signal, - a radio frequency router ; - at least one wireless access point connected to said router; and - a mobile radio modem adapted to communicate on the one hand with the mobile radio network and on the other hand with the router and said at least one wireless access point , said mobile radio modem being designed to receive at least one physical SIM card or a virtual SIM card known as an e-SIM that can be remotely reprogrammed. <EOS>