Abstract: The invention describes a 5G telephone-repeater advertising medium (100, 200, 300, 400), which comprises: a case comprising means for showing an advertising image, the case being configured to contain a 5G telephone-repeater antenna (130, 230, 330, 430); securing means (104, 304, 404) configured to secure the case to a wall or floor (123, 223, 323, 423) on which same is installed; and socket passages (105, 106; 205, 206; 305, 306; 405, 406) located in the case for the entry of an optical fibre socket and of an electrical socket, for connecting to the 5G telephone-repeater antenna (130; 230; 330; 430).