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Armageddon' emergency phone alert test prompts do not to use online banking or WhatsApp warning - Nottinghamshire Live
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Emergency alert alarm to sound on 23rd April in test that will trigger phones on silent – but Android and iPhone users can opt out
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Sound that could save your life': UK disaster alert to buzz phones on 23 April | Emergency services | The Guardian
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Sound that could save your life': UK disaster alert to buzz phones on 23 April | Emergency services | The Guardian
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