What measures are there to block smartphone signals entirely?

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Received questions

With the popularity of smart phones, more and more people are using smart phones. But not everyone knows the necessary etiquette, and they don't know when to stop using the phone. For example, the person who answers the phone loudly on the bus. Use cell phone in the cinema to get in the way of others. How can I protect my interests from being affected, and stop them from using their cell phones when necessary?

Second floor

Many countries have begun to use jamming devices in theaters in order to get people to enjoy art better.It is said that some state cinemas are now introducing jamming devices. I'm sure your state will soon be able to use the device.

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Countries

If you want to know the frequencies of your country, we can offer you some help:

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