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U

UE

User Equipment.

UICC

Universal Integrated Circuit Card. The chip card used in mobile terminals in GSM and UMTS networks. The UICC ensures the integrity and security of all kinds of personal data, and it typically holds a few hundred kilobytes.

UMA

Unlicensed Mobile Access.

UMTS

Universal Mobile Telecommunications System. Type of mobile network (next generation after GSM) that uses the USIM card for authentication.

Universal Mobile Telecommunications System

See UMTS.

user identifier

Identifier of a user which may be used, for example, in charging functionality.

USIM

UMTS Subscriber Identity Module.


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