Question: What happens to the Service Provider (SP) personalization indicator in a Mobile Equipment (ME) if the entered Service Provider Control Key (SPCK) matches the one stored in the ME during de-personalization?
Option 1: The SP personalization indicator is set to 'off', and all stored network, SP codes, and SPCK are deleted.
Option 2: The SP personalization indicator is set to 'on' as a confirmation of successful entry.
Option 3: The SP personalization indicator remains unchanged until a SIM/USIM is inserted.
Option 4: The ME initiates an over-the-air request for further authentication before updating the indicator.
Explanation: When the entered SPCK matches the stored one in the ME during de-personalization, the primary consequence is that the SP personalization indicator is set to 'off'. Note that while this describes the change in the indicator's state, the specifics about deleting stored network, SP codes, and SPCK might be nuanced; the key action is the indicator's state change to 'off'.