![Exact time millions of mobile phones across UK will emit loud alarm in national test on April 23 | Daily Mail Online Exact time millions of mobile phones across UK will emit loud alarm in national test on April 23 | Daily Mail Online](https://i.dailymail.co.uk/1s/2023/03/12/01/68595189-11849317-image-a-12_1678583091023.jpg)
Exact time millions of mobile phones across UK will emit loud alarm in national test on April 23 | Daily Mail Online
![Emergency alert alarm to sound on 23rd April in test that will trigger phones on silent – but Android and iPhone users can opt out Emergency alert alarm to sound on 23rd April in test that will trigger phones on silent – but Android and iPhone users can opt out](https://www.advertiserandtimes.co.uk/_media/img/CD0EGLTBUB6L21VPAMLO.jpg)
Emergency alert alarm to sound on 23rd April in test that will trigger phones on silent – but Android and iPhone users can opt out
When is the UK emergency alert test? What will happen on 23 April and how to turn alerts off on your phone
![Armageddon' emergency phone alert test prompts do not to use online banking or WhatsApp warning - Nottinghamshire Live Armageddon' emergency phone alert test prompts do not to use online banking or WhatsApp warning - Nottinghamshire Live](https://i2-prod.nottinghampost.com/incoming/article8320559.ece/ALTERNATES/s1200c/0_WhatsApp-Image-2023-04-04-at-080121jpeg.jpg)
Armageddon' emergency phone alert test prompts do not to use online banking or WhatsApp warning - Nottinghamshire Live
![Test of Government's new, national Emergency Alerts system at 3pm on Sunday 23rd April - My Sefton News Channel Test of Government's new, national Emergency Alerts system at 3pm on Sunday 23rd April - My Sefton News Channel](https://mysefton.co.uk/wp-content/uploads/2023/04/Emergency-Alerts.jpg)
Test of Government's new, national Emergency Alerts system at 3pm on Sunday 23rd April - My Sefton News Channel
![What time is the emergency alert test on 23 April? When the UK phone system is tested and how to turn it off What time is the emergency alert test on 23 April? When the UK phone system is tested and how to turn it off](https://wp.inews.co.uk/wp-content/uploads/2023/04/SEI_148929400.jpg?crop=498px%2C698px%2C1401px%2C791px&resize=640%2C360)
What time is the emergency alert test on 23 April? When the UK phone system is tested and how to turn it off
![Sound that could save your life': UK disaster alert to buzz phones on 23 April | Emergency services | The Guardian Sound that could save your life': UK disaster alert to buzz phones on 23 April | Emergency services | The Guardian](https://i.guim.co.uk/img/media/e0a7861c8feb45c1d8c219de99317fea914d25ec/0_0_1575_945/master/1575.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=d64d2ba85536ef841102e3bbcd47f009)