Question: What is the primary purpose of the International Mobile Station Equipment Identity (IMEI) and its variant with Software Version Number (IMEISV) in a telecom network?
Option 1: To authenticate User Equipment (UE) subscriptions for billing purposes.
Option 2: To provide location services for emergency calls.
Option 3: To manage Quality of Service (QoS) for different UE types.
Option 4: To uniquely identify Mobile Station Equipment within the network.
Explanation: The IMEI and IMEISV are designed to provide a unique identifier for each piece of Mobile Station Equipment, ensuring that every device can be distinctly recognized within the telecom network. This uniqueness is crucial for various operational, security, and management aspects, making Option 4 the correct answer. Options 1, 2, and 3, while related to telecom operations, do not accurately describe the primary purpose of IMEI/IMEISV.