Method for linking a mobile terminal (1.1) of a first user and at least one mobile terminal (1.2) of a second user via at least one server of a communications service provider (3a, 3b, 3c) via a platform configured to be connected to a mobile network, said mobile terminals (1.1, 1.2) being configured to be connected to the mobile network, characterized in that it comprises the following steps performed by the platform having a list of at least one service, each service being linked to at least one geographic availability zone: - obtaining (E2.1), via the mobile network, a first item of information on the location zone of the mobile terminal of the first user and a first alias datum determined from a user identifier linked to the mobile terminal (1.1) of the first user; - depending on said first item of location information obtained, and on the list of services, - determining at least one first available communications service (E3.1), linked to at least one geographic availability zone in which the mobile terminal (1.1) of the first user is located; - obtaining (E2.2), via the mobile network, at least one second item of information on the location zone of said at least one mobile terminal of the second user and at least one second alias datum determined from a user identifier linked to the mobile terminal (1.2) of the second user; - depending on said second item of location information obtained, and on the list of services, determining at least one second available communications service (E3.2), linked to at least one geographic availability zone in which the mobile terminal (1.2) of the second user is located; and - selecting an identical service for the mobile terminal of the first user from among the first available communication services and for said at least one mobile terminal of the second user from among the second available communication services, and linking, via the platform, depending on said first alias datum and on at least one second alias datum, of the mobile terminal (1.1) of the first user and of said at least one mobile terminal of the second user (1.2) for which said service has been selected, via said server of the provider of the selected communication service (3a, 3b, 3c). - obtaining (E2.1), via the mobile network, a first item of information on the location zone of the mobile terminal of the first user and a first alias datum determined from a user identifier linked to the mobile terminal (1.1) of the first user; - depending on said first item of location information obtained, and on the list of services, - determining at least one first available communications service (E3.1), linked to at least one geographic availability zone in which the mobile terminal (1.1) of the first user is located; - obtaining (E2.2), via the mobile network, at least one second item of information on the location zone of said at least one mobile terminal of the second user and at least one second alias datum determined from a user identifier linked to the mobile terminal (1.2) of the second user; - depending on said second item of location information obtained, and on the list of services, determining at least one second available communications service (E3.2), linked to at least one geographic availability zone in which the mobile terminal (1.2) of the second user is located; and - selecting an identical service for the mobile terminal of the first user from among the first available communication services and for said at least one mobile terminal of the second user from among the second available communication services, and linking, via the platform, depending on said first alias datum and on at least one second alias datum, of the mobile terminal (1.1) of the first user and of said at least one mobile terminal of the second user (1.2) for which said service has been selected, via said server of the provider of the selected communication service (3a, 3b, 3c).