Overview

• The UK is launching a nationwide Emergency Alert system on April 23rd to notify the public of danger.
• The alert will send messages to all smartphones in the UK at 3pm on Sunday.
• The system uses cell broadcast technology to transmit messages even without service.
• Recipients don't need to take action during the test and the alert will stop after 10 seconds.
• Some UK citizens don't want to receive the alert and suggest turning off phones during the test.