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Cell phone jammer devices are an alternative to more expensive measures against cell phones They were originally developed for law enforcement and the military to interrupt communications by criminals and terrorists. Some were also designed to foil the use of certain remotely detonated explosives. The phone jammer applications were apparent, so over time many companies originally contracted to design jammers for government use switched over to sell these devices to private entities. Since then, there has been a slow but steady increase in their purchase and use, especially in major metropolitan areas. Every phone jammer device has an antenna to send the signal. Some are contained within an electrical cabinet. On stronger devices, antennas are external to provide longer range and may be tuned for individual frequencies. The main electronic components: Voltage-controlled oscillator, Generates the radio signal that will interfere with the cell phone signal Tuning circuit Controls the frequency at which the phone jammer broadcasts its signal by sending a particular voltage to the oscillator Noise generator produces random electronic output in a specified frequency range to jam the cell-phone network signal smaller phone jammer devices are battery operated. Some look like cell phones and use cell phone batteries. Stronger devices can be plugged into a standard outlet or wired into a vehicle's electrical system. The phone jammer's effect can vary widely based on factors such as proximity to towers, indoor & outdoor settings, presence of buildings and landscape, even temperature and humidity play a role. Phone jammer in addition public backlash was growing against the intrusive disruption cell phones introduced in daily life. The phone jammer is a simple device that is used to prevent the transmission of mobile signals to the cell phones. Cell phones became corporate part of our own life. Almost everyone have them and it is hard to imagine one’s life without it. You probably use it for talking, texting, twitting, location updates, pictures, video, games and many other fun things. Still you might consider the possibility of your favorite mobile phone making your life worse. This may sound weird, so here are five ways how it does its dirty job The most interesting thing about this situation is that for installing and using such tracking devices like GPS trackers or other tracking gadgets any law enforcement departments should have an appropriate warrant. There were even a few incidents when people discovered GPS trackers under their cars and sued FBI for doing that without warrant.
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