Question: What happens when a Mobile Equipment (ME) with network personalization enabled is powered up with a SIM/USIM, and the International Mobile Subscriber Identity (IMSI) network code (MCC+MNC) does not match the one stored in the ME?
Option 1: The ME automatically attempts to update its stored network code to match the IMSI's MCC+MNC.
Option 2: The ME enters emergency calls only mode, as defined for mismatch scenarios.
Option 3: The ME prompts the user to enter a new Network Control Key (NCK) to override the mismatch.
Option 4: The ME ignores the network code mismatch and operates normally.
Explanation: This is because, with network personalization enabled, if the IMSI's MCC+MNC read from the SIM/USIM does not match the stored network code in the ME, the Mobile Station (MS) must enter emergency calls only mode. This security measure prevents the use of stolen MEs on unauthorized networks, ensuring the device can only be used for emergency services until the issue is resolved by entering the correct Network Control Key (NCK).