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The Video is about 5G Global Unique Temporary Identifier (5G - GUTI). It is allocated by Access and Mobility Management function (AMF) to the UE. GUTI is 80 bits long core network identifier consisting of PLMN + AMF ID + TMSI. It is a temporary identifier so it’s associations is not fixed to a specific subscriber or mobile. Single 5G-GUTI can be used for accessing 3GPP and non-3GPP technologies security context within the AMF. An AMF may re-assign a new 5G-GUTI to the UE at any time under specified conditions