Millions of phones across the UK sounded with a siren on Sunday as part of a test for a new national emergency alert system.
The loud alarm was planned to ring at 3pm on all devices that were using 4G and 5G networks in the UK.
Millions of phones across the UK sounded with a siren on Sunday as part of a test for a new national emergency alert system.
The loud alarm was planned to ring at 3pm on all devices that were using 4G and 5G networks in the UK.
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