Question: What is the implication if both EFSMSS (SMS status) and EFSMS files are not present together on a SIM?
Option 1: The SIM will operate in a degraded mode, still allowing for SMS reception but not transmission.
Option 2: The absence of both files is permissible, and the SIM will default to a predefined SMS status configuration.
Option 3: This scenario violates the specification; both files must be present or absent together to maintain compatibility with the Short Message Service (SMS).
Option 4: The SIM's memory capacity for SMS will automatically adjust to accommodate incoming messages.
Explanation: According to specifications, EFSMSS and EFSMS should either be present together on the SIM or both be absent. This ensures consistency and proper SMS functionality. The absence or presence of one without the other could lead to compatibility issues or unexpected behavior in SMS handling, thus violating specified requirements for seamless SMS operation.