A method connecting a user's mobile terminal with a server of a service provider. The method includes: the server stores an identifier of a card assigned to the user by the service provider, corresponding to alias data associated with a user identifier by which the mobile terminal is authenticated with the mobile network; storing, in association with the identifier, first data of a first transaction performed between the user and the service provider by using the card; establishing, via the mobile network and using a service platform capable of obtaining the alias data, a communication link between the mobile terminal and the server, in which the alias data authenticate the user with the server; sending to the mobile terminal information regarding a service provided to the user by the service provider in accordance with the first data stored in association with the card identifier corresponding to the alias data.