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Hey fellow UK folks, remember today at 3pm is the test of the #EmergencyAlert system - any phone connected to the network will sound, even if on silent or DND.
If, for whatever reason, you need a phone to not make that noise you can turn this off.
Settings > Notifications > Scroll down and turn off the options under emergency alerts.
Settings > Sound & Vibration > More Settings > Wireless Emergency Alerts > Turn off Allow Alerts
Windows Mobile 6.5: Haahahahaaha