If your phone suddenly buzzed with a loud siren-like sound and flashed an “Extremely Severe Alert” message today, you are not alone — and no, there is no emergency.
The National Disaster Management Authority (NDMA) conducted a nationwide test of India’s Cell Broadcast Alert System on Saturday, May 2, 2026. The test was launched by Union Home Minister Amit Shah along with Union Minister of Communications Jyotiraditya Scindia.
What did the message say?
Many users received an “Extremely Severe Alerts” message on their mobile devices, which read: “This is a test message for Cell Broadcast alert testing. No action is required on receipt of this message. NDMA.” A follow-up flash message also appeared stating that India had launched Cell Broadcast using indigenous technology for instant disaster alerting. The message appeared in both English and Hindi.
What is the Cell Broadcast Alert System?
Cell Broadcast System is a technology that allows authorities to send messages to all mobile devices in a specific geographic area without requiring individual phone numbers. The system has been developed by the Centre for Development of Telematics (C-DOT) and is based on the Common Alerting Protocol (CAP), as recommended by the International Telecommunication Union. It is currently operational across all 36 states and union territories of India.
The system is designed to deliver instant, geo-targeted warnings during emergencies such as earthquakes, floods, cyclones, and other disasters.
Why did your phone make noise even on silent?
The alerts may appear even if phones are in silent mode in some cases, depending on device settings. This is by design — the whole point of an emergency alert system is that it reaches you regardless of your phone’s state.
What should you do?
Nothing. Officials have appealed to the public not to panic, as this is not a real emergency but only a drill. If you receive the message multiple times, ignore it — no action is required.
Where was the test conducted?
The test covered Delhi NCR and the capital cities of all states and union territories, excluding border areas and poll-bound states.
This is a developing story.