Question: What is the purpose of including Location Area Identification (LAI) information element when a Temporary Mobile Subscriber Identity (TMSI) is used as mobile identity?
Option 1: To provide additional security features for the mobile subscriber.
Option 2: To render the TMSI non-ambiguous and identify the location area stored in the SIM/USIM.
Option 3: To enable roaming services between different network operators.
Option 4: To prioritize emergency calls over regular voice calls.
Explanation: The LAI information element is included to ensure that the TMSI is not ambiguous, by providing additional context about the location area stored in the SIM/USIM. This allows the network to correctly identify and authenticate the mobile subscriber.