The UK is gearing up for a nationwide emergency alert test this Sunday, as millions of mobile users prepare for the siren.
The alert system, designed to warn the public in genuine emergencies, will sound at 3pm on 7 September, delivering a loud siren, vibration, and on-screen message for around ten second, or until silenced by the user.
This trial follows a previous national test in April 2023 and multiple real-world activations, including during Storm Darragh in December 2024, when high winds created dangerous conditions in parts of the country.
“The UK’s new emergency alert system will send a loud siren, message, and vibration to every compatible phone, even on silent.
Survivors of abuse with hidden phones could be put at risk if the device is discovered,” stated Women’s Aid in a recent Instagram post.
Despite the system’s reach, not everyone will receive the alert. The Government advises most users to keep the service active for real emergencies, though some may have valid reasons to opt out—especially domestic abuse survivors who may have concealed devices.
Why may some miss the alert?
The exigency alert system relies on mobile phone masts to clunk compatible bias. It does n’t track druggies or collect particular data, so a position or phone number is n’t needed. still, several factors can help the alert from reaching your phone
- The device is switched off
- Phone only supports 2G or 3G networks
- Wi-Fi-only devices
- Older or incompatible models
Compatible phones include:
- iPhones running iOS 14.5 or later
- Android phones and tablets running Android 11 or later
Those using older Android versions may still receive alerts if their settings allow. Phones not operating on iOS or Android may also be supported, but aeroplane mode will block reception.
The Government warns against reading or responding to alerts while driving. Anyone behind the wheel should safely pull over before checking messages.
This emergency alert test aims to ensure the UK system works seamlessly during real emergencies. While most will hear the siren on compatible 4G and 5G devices, older phones, devices on weaker networks, or people outside the UK may not be alerted. Stay prepared. Keep your device updated.
