Question: In a scenario where a UICC (Universal Integrated Circuit Card) supplies an event list with an Access Technology Change event to a UE (User Equipment) that already has an access technology available, what action should the ME (Mobile Equipment) take immediately after receiving the TERMINAL RESPONSE?
Option 1: Ignore the event since the access technology is already available.
Option 2: Send a STATUS command to the UICC for confirmation.
Option 3: Send the ENVELOPE (EVENT DOWNLOAD - Access Technology Change) command with the current Access Technology.
Option 4: Initiate a network registration update with the new access technology.
Explanation: According to the specified behavior for handling an Access Technology Change Event when the access technology is already available on the UE, the ME must promptly respond with the ENVELOPE (EVENT DOWNLOAD - Access Technology Change) command. This ensures the UICC is informed about the current access technology in use by the UE, facilitating synchronized management of network access technologies between the UICC and the UE.