Question: What is the implication for the Mobile Equipment (ME) if a specific MexE service is not indicated as 'available' in the Universal Subscriber Identity Module (USIM)?
Option 1: The ME will periodically check with the network to see if the service becomes available.
Option 2: The ME can still select and attempt to use the service, prompting a network response.
Option 3: The ME shall not select this service, adhering to the availability indication in the USIM.
Option 4: The ME will automatically activate the service during the next network registration.
Explanation: If a MexE service is not marked as 'available' in the USIM, the Mobile Equipment (ME) must respect this indication and not initiate selection or usage of that service, ensuring compliance with the subscriber's configured service profile and potentially avoiding unnecessary network interactions.