Question: When must a SIM send the response status word '9E XX' to a Mobile Equipment (ME) in a Telecom Network?
Option 1: Always, as part of standard communication protocol
Option 2: Only if the ME indicates support for SIM Application Toolkit in its TERMINAL PROFILE
Option 3: Never, as it's reserved for future use
Option 4: If the SIM does not support SIM Application Toolkit but the ME does
Explanation: The correct answer is Option 2 because a SIM sends the '9E XX' response status word only if the Mobile Equipment (ME) has indicated its support for handling such status words through its TERMINAL PROFILE, with both supporting SIM Application Toolkit, ensuring compatibility and proper handling within the telecom network.