USIM and IC card requirements

Catalog metadata only — Scope excerpt not extracted yet

TS 21.111 defines the requirements for the USIM application and the IC card (UICC) used in 3G systems. The USIM is characterized as a 3G application residing on the UICC that interoperates with a 3G terminal to enable access to 3G services. Requirements are derived from the service and security requirements in TS 22.100 and TS 22.101. The document is scoped as a foundational basis for detailed USIM, UICC, and terminal-interface specifications rather than being the detailed spec itself. A RAN or core engineer would open this document when needing to understand the top-level requirements driving USIM and UICC design — for example, when tracing why a particular security or service capability must be supported by the subscriber identity infrastructure, or when verifying that a terminal-to-UICC interface requirement has a clear upstream justification. It is also a useful starting point before diving into the detailed ETSI UICC or 3GPP USIM specs, since it establishes the requirement baseline from which those detailed specifications are derived.

Generated 7/26/2026 · cached for 90 days