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.