Question: What happens to an active circuit switched call if the Mobile Equipment (ME) detects the absence of a UICC (Universal Integrated Circuit Card) within the specified time frame?
Option 1: The call is put on hold for 5 seconds before resuming.
Option 2: The ME sends a STATUS command to the network to verify connectivity.
Option 3: The call remains active for an additional 30 seconds to allow for UICC reinsertion.
Option 4: The call is terminated as soon as possible, but at least within 5 seconds after detecting UICC absence.
Explanation: According to UICC presence detection protocols, if the ME detects UICC absence during a call and this condition persists, the call must be terminated promptly for security reasons. The call is ended at least within 5 seconds of detecting UICC absence, making Option 4 correct.