It is also useful for detecting the use of mobile-phone for spying and unauthorized-video-transmissions. It can therefore be potentially used to prevent use of mobile-phones in restricted and unauthorized-places, such as examination-halls, confidential and private-government meetings-venues, and business-companies-seminar-halls among others. Overall, the results of this brief-study are potentially-useful, as the mobile-phone-transmission-detector can sense the presence of an activated-mobile-cell-phone from a distance of about 4 meters. The following-study aimed at developing a circuit that would be able to detect any mobile-phone activities such as: sending or receiving calls and text-messages, unauthorized-audio or video-transmission or any other type of data-transmission, yet the phone is kept in the silent-mode. This magnified the need for developing more-efficient and reliable-means of mobile-phone-signal-detection. Recently, we have witnessed, locally and globally, a dramatic-boom in the wireless-communications industry, hence increasing the number of mobile-devices-users.
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