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The UK Government plans to test the Emergency Alerts System to make sure the technology operates as intended and alert messages are received by all compatible handsets. You do not need to do anything when they receive the UK-wide test message on Sunday 7 September.
If you receive an emergency alert on your phone, you will hear a loud, siren-like sound.
The system uses cell broadcast technology – if an emergency occurs in a specific geographical location then the phone masts in that area send a message to all compatible mobile phones to warn of the danger to life. The system does not collect, store or use any personal information.
Further information is available here about how to opt out by changing the settings on your phone.
