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.
Phones across the country rang out with a siren at 3pm as part of a government trial of the new national alert system, which will be used to contact residents in the case of a life-threatening emergency. It will be used in future to warn people about dangerous situations, such as floods or during terror attacks.
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.
