Confirm the power supply switch of cell phone jammer

Confirm the power supply switch of cell phone jammer is in the off position.
Generally refers to the navigation cell phone GPS navigation, satellite navigation and cell phone is. GPS navigation system is based on global positioning satellites 24 based around the globe around the clock to provide three-dimensional position, velocity and other information of a three-dimensional radio-navigation system. And mobile electronic map difference is that it can tell you the location on the map, and you want to go in that place on the map the location and the location where you can select the best routes and destinations, and In the process of moving tips for you to turn left or right, this is the so-called navigation. Now to buy this kind of cell phone is built-in GPS module to see there is no map or GPS module. Now the market is also divided into two categories navigation cell phone, one is real by the GPS satellites in space navigation. If the blocking range of the single cell phone jammer is bigger than the needed shielding range, it can be realized by adjusting the emission power of cell phone jammer .
The other is through the base stations and high-precision navigation network, known as A-GPS, mobile operators using A-GPS positioning technology based on the location of service, end users can easily and quickly learn their current position or others, especially for vehicle tracking and navigation systems, and has a special task vehicles (armored cars, ambulances, fire engines, etc.), can significantly improve vehicle safety, transport efficiency and service quality. GPS is a satellite-based positioning system, free for anyone to use, but only the latitude and longitude location of the user, combined with the map to obtain the exact location. The A-GPS is mobile or base station Unicom to provide positioning signals, providing more accurate positioning information, which is the flow of fees charged.The virus. Smart cell phones and we use every day, desktops, notebooks, are based on an open platform, so the virus is something every minute. In view of this, back up any important data is the use of smart cell phones must be done. Crash. Since it is a WindowsXP desktop and open nature of the operating system, when subjected to unlawful interference and crashes the program, it is common. So best not to deliberately install a variety of applications. In addition, the software loaded more, save more documents, cell phone data read and write speed will be slow, this and the "death" of the same reason. For the cell cell phone and cell phone jammer market has the large potential, it can bring the large-scale interest.