If your phone buzzed with an "Extremely Severe Alert" on May 2, 2026, you were not alone. The Government of India conducted a nationwide test of its indigenously developed Cell Broadcast System, a disaster alerting service that pushes emergency messages directly to every active mobile device within a target geographic zone, with no app download or subscription required. Citizens across Delhi NCR and the capital cities of all 28 States and 8 Union Territories received the test message in multiple languages, including English, Hindi, Telugu, and Marathi, with the alert confirming that no action was required from recipients.
The real story, however, is the infrastructure behind the alert. At its core is SACHET, the Integrated Alert System developed by the Centre for Development of Telematics, a government-backed telecom research institution operating under the Department of Telecommunications. Unlike conventional SMS alerts that are delivered individually to each number, Cell Broadcast technology transmits a single message simultaneously to all compatible devices within a defined area, making it significantly faster and more reliable when networks are under stress during an actual emergency. The system is built on the Common Alerting Protocol, the globally recognised standard recommended by the International Telecommunication Union.
If you receive a message like this on your phone, it is a test alert as part of India’s new nationwide mobile-based Disaster Communication System, developed by the @cdot_india team at @DoT_India with @ndmaindia, using cell broadcast technology.
— Jyotiraditya M. Scindia (@JM_Scindia) May 2, 2026
This system will henceforth be… pic.twitter.com/eweuvJA12r
With this launch, India joins a small group of countries running sovereign, self-built mass alert systems, placing it alongside nations like the United States and Japan that have long used Cell Broadcast for public emergency communication. The SACHET platform is already active across all 28 States and 8 Union Territories and has, to date, delivered over 134 billion SMS-based alerts in more than 19 Indian languages during cyclones, floods, and extreme weather events. The addition of Cell Broadcast capability represents a significant upgrade, ensuring alerts reach citizens even when individual SMS delivery may be delayed or disrupted.
The system was officially launched on May 2, 2026, by Union Home Minister Amit Shah, in the presence of Union Minister of Communications Jyotiraditya Scindia. The Department of Telecommunications, in collaboration with the National Disaster Management Authority, has urged citizens to cooperate during the ongoing testing phase and confirmed that all messages received during this period are purely for system validation, with no response required from the public.
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