Question: What should the network do if the Mobile Station (MS) has not indicated Packet Flow Control (PFC) procedure support in the PFC feature mode field of the MS Network Capability Information Element (IE)?
Option 1: The network shall include the Packet Flow Identifier IE to indicate the associated PDP context.
Option 2: The network shall not include the Packet Flow Identifier IE and the MS will keep the old value.
Option 3: The network can either include or exclude the Packet Flow Identifier IE, depending on other conditions.
Option 4: The network should send an error message to the MS.
Explanation: According to the specification, if the MS has not indicated PFC procedure support, the network shall not include the Packet Flow Identifier IE. In this case, the MS will keep the old Packet Flow Identifier value.