Tests of the UK’s emergency alert system are planned to occur on 22 June, 2021.
Some mobile phone networks in the UK are running the tests between 1pm and 2pm.
People with android phones may get a test alert, which will involve a loud siren-like sound.
The alert will say: “This is a mobile network operator test of the Emergency Alerts service.
You do not need to take any action.
To find out more, search for gov.uk/alerts.”
Members of the public are able to opt out of mobile phone network tests.