The the UK’s emergency alert system is due to be tested at 3pm on today Sunday 23 April, causing all 4G and 5G-capable mobile phones in the country to make a loud siren-like sound even if they are placed on silent.
The alerts are designed to notify the public of life-threatening emergencies, but there are cases where the test could expose hidden mobile phones and put people at risk of domestic abuse or put others in danger.
Ensuring your phone is turned fully off before 3pm on Sunday will stop it from making a sound. But you can also disable the alerts via settings on your phone for a more permanent solution. Search for “emergency alerts” within settings to quickly find the options.
