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UMTS
Universal Mobile Telephony System. UMTS
refers to asynchronous 3G wireless technology
of WCDMA that is developed based on GSM,
the 2G wireless technology.
USB
Universal Serial Bus. A bus type interface that
provides fast and flexible connection between
devices and a computer.
USIM
Universal Subscriber Identity Module. An IC card
used for UMTS the shape of which is the same
as that of the SIM card of GSM. USIM is