A method for allowing a user of a mobile terminal to benefit from services provided by a foreign locally accessible mobile network as a regular subscriber of said network, comprising the steps of: providing a mobile terminal; providing an apparatus, said apparatus comprising a first modem, a second modem and a physical subscriber identity module inserted into a slot that is electrically connected to said first modem, the first and second modems (13, 14) being cellular modems, the physical subscriber identity module comprised in the apparatus being attached to said first modem, and said apparatus further comprising a wireless routing interface for communication with the mobile terminal; providing a remote server, said remote server containing a plurality of subscriber identity modules; connecting the mobile terminal with the apparatus using the wireless interface; registering the apparatus with a foreign locally accessible mobile network using the first modem and the subscriber identity module attached to said first modem, and establishing a data connection between the apparatus and the remote server; in using said data connection, providing the remote server with an information allowing said remote server to determine which subscriber identity module, among the subscriber identity modules it contains, is allowing local benefit of the services provided by the foreign locally accessible mobile network, and selecting, within the plurality of subscriber identity modules, said subscriber identity module; assigning the selected subscriber identity module to the second modem; registering the apparatus with said foreign locally accessible mobile network using the second modem and the selected subscriber identity module; and allowing the user of the mobile terminal to benefit from services provided by said foreign locally accessible mobile network, wherein the data connection to the remote server is maintained in order to maintain the selected subscriber identity module connected to the second modem. providing a mobile terminal; providing an apparatus, said apparatus comprising a first modem, a second modem and a physical subscriber identity module inserted into a slot that is electrically connected to said first modem, the first and second modems (13, 14) being cellular modems, the physical subscriber identity module comprised in the apparatus being attached to said first modem, and said apparatus further comprising a wireless routing interface for communication with the mobile terminal; providing a remote server, said remote server containing a plurality of subscriber identity modules; connecting the mobile terminal with the apparatus using the wireless interface; registering the apparatus with a foreign locally accessible mobile network using the first modem and the subscriber identity module attached to said first modem, and establishing a data connection between the apparatus and the remote server; in using said data connection, providing the remote server with an information allowing said remote server to determine which subscriber identity module, among the subscriber identity modules it contains, is allowing local benefit of the services provided by the foreign locally accessible mobile network, and selecting, within the plurality of subscriber identity modules, said subscriber identity module; assigning the selected subscriber identity module to the second modem; registering the apparatus with said foreign locally accessible mobile network using the second modem and the selected subscriber identity module; and allowing the user of the mobile terminal to benefit from services provided by said foreign locally accessible mobile network, wherein the data connection to the remote server is maintained in order to maintain the selected subscriber identity module connected to the second modem.