Abstract: Management of multiple subscriber identity modules by a server is disclosed. The server, for each subscriber identity module belonging to a set of subscriber identity modules of a user of a mobile terminal, detects a need to top up credit of the subscriber identity module, and after the detection, transmits, through a communication interface, transaction data determining a payment to the mobile phone operator of the subscriber identity module in order to top up the credit of the subscriber identity module.

Abstract: An apparatus with the middle structure being layered between the first outer structure and the second outer structure. The operational circuitry includes a plurality of pockets for subscriber identity module cards, the pockets being arranged in two parallel rows in a planar fashion. The pockets of each row are placed next to each other and include open sides capable of receiving the subscriber identity module cards. The open sides of the pockets of different rows face in opposite directions. The middle structure includes a plurality of holes in rows for transferring subscriber identity module cards therethrough to the pockets or from the pockets, the holes of the middle structure of different rows facing in opposite directions, and the holes being on the open sides of the pockets.

Abstract: Management of multiple subscriber identity modules is disclosed. An apparatus includes an interface to a set of subscriber identity modules of a wireless communication system; one or more processors, and one or more memories storing instructions, that, when executed by the one or more processors, cause the apparatus to: obtain data relating to the subscriber identity modules through the interface; obtain data relating to a mobile terminal; obtain at least one selection ground for the subscriber identity module; and select at least one optimal subscriber identity module for use by the mobile terminal on the basis of the data relating to the subscriber identity modules, the data relating to the mobile terminal, and the at least one selection ground for the subscriber identity module.

Abstract: Management of multiple subscriber identity modules is disclosed. A method comprises: obtaining data relating to subscriber identity modules of a wireless communication system; obtaining data relating to a mobile terminal; transmitting the data relating to the subscriber identity modules and the data relating to the mobile terminal to a service provider server; and receiving a selection from the service provider server of at least one optimal subscriber identity module from among the set of the subscriber identity modules for use by the mobile terminal.