Question: In a UICC-terminal interface scenario, as per the USIM application test specification, what EMM parameters must be stored on the USIM (if the corresponding file is present) to ensure conformance?
Option 1: IMSI, IMEI, and EPS bearers
Option 2: GUTI, Last Visited Registered TAI, and EPS Update Status
Option 3: APN, PDN Type, and Mobility Management State
Option 4: UE Identity, Serving Cell ID, and RRC State
Explanation: The correct answer, GUTI (Globally Unique Temporary Identifier), Last Visited Registered TAI (Tracking Area Identity), and EPS Update Status, are specified as mandatory EMM parameters to be stored on the USIM if their corresponding files are present, ensuring proper network attachment and session management. These parameters are crucial for user equipment's (UE) mobility and connectivity management in EPS (Evolved Packet System) networks.