Question: What is the primary purpose of the EFICT (Incoming Call Timer) file in a USIM application?
Option 1: To store the subscriber's preferred network list for roaming.
Option 2: To accumulate and store the total duration of outgoing calls made by the UE (User Equipment).
Option 3: To contain the accumulated incoming call timer duration value for current and previous calls, specific to the USIM application.
Option 4: To manage and update the list of forbidden public land mobile networks (PLMNs) for the subscriber.
Explanation: The EFICT file's primary purpose is to store the accumulated duration of incoming calls, both current and previous, specific to the USIM application, providing insights into incoming call durations for the subscriber.