Question: In a Public Safety UE supporting ProSe, what is the primary role of the UICC regarding ProSe usage information reporting?
Option 1: To initiate ProSe direct communication sessions with other UEs
Option 2: To store and transmit ProSe usage reports to the ProSe Function CTF using BIP mechanism for charging purposes
Option 3: To authenticate ProSe-enabled UEs before allowing direct communication
Option 4: To manage QoS settings for ProSe direct communications
Explanation: In the context of Public Safety and ProSe functionality, the UICC plays a crucial role in storing ProSe-related data necessary for billing. It communicates these reports to the ProSe Function's Charging Trigger Function (CTF) using the Bearer Independent Protocol (BIP) mechanism, essential for accurate charging and billing of ProSe direct communication services.