Question: What triggers a File Change Notification REFRESH on the UICC after a successful update of Routing Indicator Data via NAS messages in a 5G System (5GS)?
Option 1: Receipt of a new UE parameters update data set with an updated International Mobile Subscriber Identity (IMSI)
Option 2: Completion of a secure packet integrity check for a UE parameters update data set with a different USIM Application Toolkit (USAT) version
Option 3: Successful processing of a Location Update procedure initiated by the User Equipment (UE)
Option 4: Successful processing of the Routing Indicator data from the secure packet on the Universal Integrated Circuit Card (UICC)
Explanation: The correct answer is Option 4 because, according to the specified behavior for updating Routing Indicator Data via NAS messages in a 5G System, after the UICC successfully processes the Routing Indicator data from the secure packet received in a DL NAS TRANSPORT message, it issues a File Change Notification REFRESH. This action is directly tied to the update and processing of the Routing Indicator Data, not to other procedures or updates (like IMSI updates, USAT version changes, or Location Update procedures).