Britons urged to ‘keep their cool’ as siren-like sound to emit from millions of devices on Sept 7 at 3pm
Britons urged to ‘keep their cool’ as siren-like sound to emit from millions of devices on Sept 7 at 3pm
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Hand held devices connected to 4G and 5G are set to vibrate and produce the sound for up to 10 seconds.
Millions of phones will emit a siren sound and vibrate during the drill
Secretary of State Pat McFadden said he knows Brits will 'keep their cool' when their phones make a siren-like noise for 10…
Millions of Brits' phones will vibrate and make a siren sound for around 10 seconds as they receive a text of fewer than 100…
At around 3pm on Sunday 7 September, millions of phones will vibrate and make a siren sound for around 10 seconds as Brits…
Millions of UK phones to sound siren in national emergency alert test, part of government resilience efforts.
Don't panic: U.K. phones to sound at once in emergency drill
