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ETSI TS 131 121
M00000429
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ETSI TS 131 121 Universal Mobile Telecommunications System (UMTS); UICC-terminal interface; Universal Subscriber Identity Module (USIM) application test specification (3GPP TS 31.121 version 3.15.1 Release 1999)
standard by European Telecommunications Standards Institute, 12/01/2005
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