Question: What is the significance of the first 6 bits in the Mobile Identification Number (MIN) field, as per the SIM-ME interface specification for EFMIN?
Option 1: They represent the country code of the mobile station's home network.
Option 2: They are used to differentiate between AMPS and TIA/EIA-136 air interfaces.
Option 3: They are unused (reserved) in the MIN field coding structure.
Option 4: They indicate the type of mobile equipment (ME) being used.
Explanation: According to the EFMIN specification, the first 6 bits of the Mobile Identification Number (MIN) field are specifically designated as unused. This implies that these bits do not carry any operational or identifying information about the mobile station within this context.