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ETSI TS 131 121
M00000970
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ETSI TS 131 121 Universal Mobile Telecommunications System (UMTS); LTE; 5G; UICC-terminal interface; Universal Subscriber Identity Module (USIM) application test specification (3GPP TS 31.121 version 15.7.0 Release 15)
standard by European Telecommunications Standards Institute, 04/01/2020
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