Question: When the APN Control List service is enabled on a User Equipment (UE), what action does the UE take if no Access Point Name (APN) is indicated in a PDP context request, implying a network-provided APN should be used?
Option 1: The UE proceeds with the PDP context activation without checking EFACL.
Option 2: The UE checks if 'network provided APN' is contained within EFACL before proceeding.
Option 3: The UE automatically selects a default APN from EFACL for the request.
Option 4: The UE rejects the PDP context request and notifies the user of the issue.
Explanation: According to the APN Control List service rules, if no APN is indicated (implying a network-provided APN), the UE must verify that 'network provided APN' is listed in EFACL (Access Point Name Control List) before requesting PDP context activation from the network. This ensures only approved, network-provided APNs are used when not explicitly specified by the user or application.