Not to get too off topic, but I find this stuff fascinating. Cell phone jammers have been around forever, they’re nothing new. All a jammer does is block specific frequencies. I did some research on these things a while back. I’m not sure if they’ve adapted, but it used to be a typical cell phone jammer blocked the 800 MHz to 1900 MHz spectrum which is what our mobile phone protocols (iDEN, CDMA and GSM) operate on for voice and data. I’m not sure about other 4G technologies, like Verizon’s LTE or AT&Ts LTE or HSPA+, but I know Sprint’s wimax operates on the 2300 MHz band.
So to throw a curve into all of this, If there was a device jamming wireless frequencies, and it couldn’t block anything higher than 1900 MHz, if you were in a 4G area, you could still use your cell phone for data, and VoIP using apps like Skype.
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