.. How to help make a cell phone jammer? For almost any jammer circuit, it’s essential to have 3 vital sub circuits: RF amplifier, Voltage Controlled Oscillator and Tuning circuit You can even use this cell signal jammer to dam any cell-based monitoring devices which make use of your GPS https://landencugxf.sharebyblog.com/12502955/the-smart-trick-of-handheld-signal-jammer-that-nobody-is-discussing