At 3pm on Sunday 23 April there will be a national test of the UK Emergency Alerts service. The system is designed to warn people when their lives are in danger.
You do not need to take any action. Simply swipe away the message or click OK on the home screen and continue to use your phone as normal.
As seen in other countries, Emergency Alerts help keep you safe if there is an immediate risk to life by sending an alert direct to your mobile phone.
To find out more about the planned upcoming test visit: gov.uk/alerts