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Devices that can detect mobile phones have been available for a long time, and now it's even simpler. But I don't understand what you're talking about, why do you want to install this device in the toilet?
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Of course, there is such a device, because the mobile phone communication is in a special frequency band, if the receiver receives such a signal, it can be presumed that it is a mobile phone signal, so as to carry out interference shielding according to the setting.
You can communicate with the host, let them go to the toilet and close the door, and they will not be so familiar that they don't even close the door when they go to the toilet, and they always have to leave some privacy. >>>More
It is recommended that you go to the temple and ask for an amulet to take with you.
The decorator turned the glass back!
That's a mark made by a builder with a nylon pen! >>>More
Welcome so many movies, many I didn't know you wanted to watch this movie.
It could be, or it could be that they were talking about something related to you and didn't want you to know.