Question: What action does the UE take when it receives a REGISTRATION ACCEPT message via non-3GPP access with an MCC matching the current country, and it has not been registered or attached via 3GPP access in that country?
Option 1: The UE stores the local emergency numbers list or the extended local emergency numbers list or both, as provided by the network.
Option 2: The UE discards any previously stored local emergency numbers list or extended local emergency numbers list.
Option 3: The UE sends a registration request to the 3GPP access network.
Option 4: The UE ignores the REGISTRATION ACCEPT message.
Explanation: According to the 3GPP specification, when the UE receives a REGISTRATION ACCEPT message via non-3GPP access with an MCC matching the current country, and it has not been registered or attached via 3GPP access in that country, it stores the local emergency numbers list or the extended local emergency numbers list or both, as provided by the network. This ensures that the UE has the most up-to-date emergency numbers for the current location.