Do cell phone signal jammers need to be adjusted?
Signal shielding is required in many places, but many people don't know how to install a cell phone signal jammer. Some people believe that signal jammers can be connected directly to the mains, while others believe that the frequency needs to be adjusted. It's hard to tell if a cell phone jammer is working, so let's look at how signal blocker works. 1. Adjacent channel interference....
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