Question: What is the primary purpose of the EFDIR (Elementary File Directory) file at the Master File (MF) level in a UICC?
Option 1: To store ICCID (Integrated Circuit Card Identifier) values for all applications.
Option 2: To provide a path object for direct application selection.
Option 3: To contain the Application Labels only for non-3GPP applications.
Option 4: To hold the Application Identifiers (AIDs) and Application Labels of present 3GPP applications.
Explanation: The EFDIR file identifies and organizes UICC applications. Its primary purpose at the MF level is to contain both Application Identifiers (AIDs) and Application Labels of all present 3GPP applications, facilitating application selection via AID for compatibility and standardization.