featured I used a mobile phone jammer during the CET-4 and CET-6 exam, but the effect was not good. How can I solve it?
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How do students' mobile phones block WiFi signals before the exam? And how to block cell phone signal?
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The mobile phone signal jammer with 5G signal shielding function is used in school exams. How to choose the right one that is economical and practical?
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How to choose a portable frequency jammer?
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What factors affect the shielding effect of the mobile phone shielding device? How to strengthen the shielding effect of the shielding device?
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In addition to the mobile phone signal shielding device, what other devices can also be used as shielding devices?
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From 2021, the 5G shield has been upgraded again
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