The 2012 report by the California Council on Science and Technology said the system wouldn’t block 4G, Wi-Fi, MiFi, Skype, text messages or satellite transmissions. It can’t triangulate radio signals, limiting its effectiveness in identifying specific phones or users. And radio frequency leakage could interfere with regular cellphone usage, affecting the public’s access to 911 operators. But the state forged ahead, installing the system at 18 prisons before deciding it wasn’t working.
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