That was my next question. I've seen commuters use those devices on trains to shut loud cell phone users up. They buy the devices online from China. It disrupts the cellular signal for everyone within the radius.
handheld cellphone jammers, $10,000 civil penelty fine from the FCC. wouldn't try it, homeland security has mobile devices that will detect cell phone jammers.
That was my next question. I've seen commuters use those devices on trains to shut loud cell phone users up. They buy the devices online from China. It disrupts the cellular signal for everyone within the radius.
I've got one of those devices, used it in the middle east when I was traveling, put it in my backpack, turned it on just before every checkpoint. But I won't risk using it that way, $10,000 fine.
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