Emergency alert test review announced as some phones now 'unable to make calls'

A review will be carried out to find out why some mobile phones did not receive the test of a new national emergency alert system on Sunday.

The test alert was set to be sent out nationwide on all mobile phones that are compatible with 4G and 5G. Phones let out a siren sound followed by the message.But although the 'vast majority of compatible phones' received the alert, according to The Cabinet Office, the 10-second alarm and message notification was not delivered to some mobile phones. Customers on the Three mobile phone network were among those to report not receiving the communication test.

The Cabinet Office stated that engineers had not spotted a trend of phone functions failing to work afterwards, but said officials were in the early stages of analysing the results of the trial run. A UK Government spokesman said: “We have effectively completed the test of the UK-wide Emergency Alerts system, the biggest public communications exercise of its kind ever done.In a statement, a spokesman for Three said: “We are aware that a number of customers have not received the test alert.

Phones that were powered down or switched to airplane mode were not expected to sound. Speaking before the test, Deputy Prime Minister Oliver Dowden conceded the drill could be 'annoying', but that it had the potential to save people’s lives once rolled out.

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