What is an Emergency Alert? 🚨 There will be an Emergency Alerts test on Sunday 7 September at 3pm across compatible mobile phones and tablets in the UK. How to turn off Emergency Alerts on UK phonesIf you do not wish to receive an emergency alert message as part of the national training, you can opt out. Recommended reading:Other mobile phonesDepending on the manufacturer and software version of your phone, emergency alert settings may be called different names, according to the Government website. The government website says to go to:‘Message’, then ‘message settings, then ‘wireless emergency alerts’, then ‘alert’‘Settings’, then ‘sounds’, then ‘advanced’, then ‘emergency broadcasts’‘Settings’, then ‘general settings’, then ‘emergency alerts’"Then turn off ‘test alerts’, ‘exercise alerts’, ‘operator defined’ and ‘operator alerts’," it adds.