Question: In EFPSLOCI (Packet Switched location information), what is the significance of setting LAC (Location Area Code) to 'FF FE' in conjunction with Routing Area update status set to 'not updated'?
Option 1: To indicate the UE's current location as unknown to the network.
Option 2: To trigger an immediate handover to a different base station.
Option 3: To ensure the UE performs a location update at the beginning of a test.
Option 4: To signal the network that the UE is in idle mode.
Explanation: Setting LAC to 'FF FE' along with the Routing Area update status as 'not updated' is a specific configuration used to prompt the User Equipment (UE) to initiate a location update procedure at the outset of testing, ensuring the UE's location is registered with the network for subsequent tests.