John Acres - Your phone will have an emergency alert this Sunday - Why & how will it work? - 大象传媒 Sounds
John Acres - Your phone will have an emergency alert this Sunday - Why & how will it work? - 大象传媒 Sounds
Your phone will have an emergency alert this Sunday - Why & how will it work?
Professor Judy Edworthy from the University of Plymouth is an expert in alarms.
