Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Characteristics of the IP Multimedia Services Identity Module (ISIM) application (V8.5.0; 3GPP TS 31.103 version 8.5.0 Release 8)
The present document defines the ISIM application for access to IMS services. The present document specifies: - specific command parameters; - file structures; - contents of EFs (Elementary Files); - security functions; - application protocol to be used on the interface between UICC (ISIM) and Terminal. This is to ensure interoperability between an ISIM and Terminal independently of the respective manufacturer@ card issuer or operator. The present document does not define any aspects related to the administrative management phase of the ISIM. Any internal technical realisation of either the ISIM or the Terminal is only specified where these are reflected over the interface. The present document does not specify any of the security algorithms that may be used.