The invention concerns user profiles associated with terminals. It consists of a method for adapting a common user profile (4) used by a service provider of audio and/or video broadcast on a common terminal to customize the service provided, including: a step of detecting at least one new terminal (5, 6 or 7) in the neighborhood of the common terminal; a step of enabling at least one new terminal detected on at least one first condition that it is to remain in the neighborhood of the common terminal for a duration compatible with the customization of the service provided; a step of determining one or more user profiles corresponding to one or more new enabled terminals; a step of correlating one or more predetermined profiles with one or more parameters representing the common profile used by the service provider so as to obtain a new common user profile; a step of implementation, by the service provider, of said new common user profile at least if the new common user profile is sufficiently different from the common user profile used by the service provider, to modify the customization of the service provided.