request_id is the unique task identifier returned in the response header of the asynchronous operation interface (e.g., Add / Remove SIM Cards).action_code = 70action_code = 71request_id is returned in the response header of the "Add SIM Cards to a Specified Group" and "Remove SIM Cards from a Specified Group" interfaces. The caller must retain it for subsequent result queries.action_code 70 and 71).