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The demand for mobile phone signal jammers in various conferences and examinations | #signal jamme #wifi #5…

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YIFA LIU
YIFA LIU  Creó nuevo artículo
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The demand for mobile phone signal jammers in various conferences and examinations | #signal jamme #wifi #5g #4g #gms #gps #cell phone

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The demand for mobile phone signal jammers in various conferences and examinations

Especially in a certain elementary school, after a certain exam, the signal blocker continued to be turned off for 2 weeks. It was not until we investigated the scene that we found that the jammer continued to be turned on on the side of the podium in a classroom full of primary school stu
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