What to expect during mobile emergency alert test | The IndependentNotifications can be managed in browser preferences.Jump to contentIndependentNext articleIndependent Bulletin homepageSocial PartnerWe are 8 logo (opens in a new tab)AllNewsSportCultureLifestyleAlexander ButlerThursday 07 August 2025 16:34 BSTListen to what the government emergency alarm sent to phones will sound likeThe UK is preparing for its "largest public safety exercise in British history" with a nationwide mobile phone emergency alert test.Millions of smartphones on 4G and 5G networks across the UK will emit a loud siren-like noise and vibrate at 3pm on 7 September.This trial is part of the UK's emergency alert system, designed to warn the public of life-threatening disasters such as major storms or wildfires.Cabinet Minister Pat McFadden stated the system could save lives; the service was previously used during major storms and an unexploded Second World War bomb incident in Plymouth.The alert message will clearly state it is a test and advise recipients that no action is required, while providing guidance for real emergencies.In fullMillions to receive emergency alert in ‘largest public safety exercise in British history’Thank you for registeringPlease refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in