Question: In a 3GPP-compliant network, when initiating an Over-The-Air (OTA) de-personalization cycle for a Mobile Equipment (ME) using the method that involves sending keys via the SIM/USIM, what is the primary identifier NOT included in the transmission to the ME?
Option 1: Control Key(s) of the personalisation categories
Option 2: International Mobile Equipment Identity (IMEI)
Option 3: User Data for SMS
Option 4: Network Subset Identifier
Explanation: According to the specifications, when de-personalizing an ME via SIM/USIM, the process only checks the keys and does not require or include the IMEI in the transmission. This contrasts with the method where both IMEI and Control Key(s) are sent directly to the ME for verification. Thus, the primary identifier NOT included in this specific OTA de-personalization method via SIM/USIM is the IMEI.