A method for updating the configuration of a mobile subscriber identification module that enables a mobile terminal (mobile) operable in a mobile radio network to have an access to the mobile radio network, which access authenticates a mobile subscriber in the mobile radio network, with respect to the use of services that are available in the mobile radio network and/or functionalities of the mobile radio network by the mobile subscriber and/or the mobile terminal (mobile) used by this one, wherein at least one identifier is provided by the mobile subscriber identification module, which identifier enables to register a need for updating of the mobile subscriber identification module by at least the mobile radio network, and wherein the following steps will be realized on the mobile subscriber identification module and/or by the mobile terminal (mobile) using the mobile subscriber identification module: - gathering the identifier of the mobile subscriber identification module, - sending a message containing the identifier to a network node of the mobile radio network, - receiving a response message, that has been generated with respect to the message by the mobile radio network, from a network node of the mobile radio network at least if there is a need for updating with respect to the use of services that are available in the mobile radio network and/or functionalities of the mobile radio network by the mobile subscriber and/or the mobile terminal (mobile) used by this one, - extracting at least one updating information item from the received response message if there is a need for updating with respect to the use of services that are available in the mobile radio network and/or functionalities of the mobile radio network by the mobile subscriber and/or the mobile terminal (mobile) used by this one, and - storing the updating information item on the mobile subscriber identification module, characterized in that the identifier enables, apart from recognizing a need for updating, an identification of otherwise identical mobile subscriber identification modules, which identification can be distinguished at least by the mobile radio network, and by means of which identification an individualisation of mobile subscriber identification modules of a set of mobile subscriber identification modules, in particular so called twin, tri or multi SIM sets can be obtained. - gathering the identifier of the mobile subscriber identification module, - sending a message containing the identifier to a network node of the mobile radio network, - receiving a response message, that has been generated with respect to the message by the mobile radio network, from a network node of the mobile radio network at least if there is a need for updating with respect to the use of services that are available in the mobile radio network and/or functionalities of the mobile radio network by the mobile subscriber and/or the mobile terminal (mobile) used by this one, - extracting at least one updating information item from the received response message if there is a need for updating with respect to the use of services that are available in the mobile radio network and/or functionalities of the mobile radio network by the mobile subscriber and/or the mobile terminal (mobile) used by this one, and - storing the updating information item on the mobile subscriber identification module,