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What does the uses of cell phone blocker?

Arthur W. Jul 11, 2018 17:11

With the popularity of jamming devices in recent years, you've probably heard of signal blocker.But what's the purpose of this device, you know?

Cell phone signal jammer is the most common jamming device. This device is usually used examination room, gas stations, churches, courts, libraries, conference centers, theaters, hospitals, military power and other places prohibit the use of mobile phones.