That wraps up the UK government's second test of its national emergency alert system. While it seems to have gone smoothly for most, some people did experience problems with the test. The BBC's ...

The government has urged people to "keep their cool" when the national system for sending emergency alerts to mobile phones in the UK is tested on Sunday. At 15:00 BST, compatible phones will vibrate ...

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Add Yahoo as a preferred source to see more of our stories on Google. A cellphone shows a test message from the Alert Ready system. (Credit: Ryan Stelter) Prepare yourself for surprise loud noises ...