A simultaneous smartphone shock is coming for Brits

In September, the U.K. will conduct a test of its emergency alert system, resulting in the simultaneous activation of around 85 million smartphones, which will vibrate and emit a siren sound for 10 seconds. This event aims to assess the effectiveness of the emergency communication system across the nation.

Explain It To Me Like I’m 5:

U.K. to test emergency alert system with 85 million smartphones vibrating and making loud sounds in September.

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