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Under normal circumstances, we recommend that you use a universal GSM / GPS signal blocker.However, as long as your mobile phone is working, this is not enough. It works when you have a Network Jammer Device Price phone so it continues to work while the GSM and GPS frequencies are disturbed. In this case, the tracker installed in your car will not be able to send information about your current location, speed, etc.Otherwise, you will have to use a simple GPS jamming device that will block communication between satellites and the tracker.In this case, the tracker cannot determine your location, but it still has a connection to a dispatch and notifies it that the satellite signal has been lost.

Also note that these trackers may have additional modules such as: Such as a fuel gauge, built-in accelerometer, and others that do not require GPS signals to function properly. All data collected with these modules are sent to a dispatcher via GSM frequencies and are visible to them, regardless of whether you have switched the gsm jammer on or off.Indeed you can.If you want to interfere with GPS but still want to talk on your phone, you need to use a GPS jammer.This device is blocking all GPS signals in its work area so the GPS module on your Sprint CDMA phone will not work.

Even if the GPS module starts to work, it is completely useless without a GPS signal to find your location, and GPS only speeds up the process. As for the phone, I would recommend that you continue to use your CDMA phone as GSM phones often combine the GPS modules with GSM modules into one unit.So if you interrupt the work of A-GPS, there may be communication problems.You should also consider the triangulation of the cell tower.If this tracker has certain software, it can find your raw coordinates between three nearest cell towers.The phones don't have such a problem.If you make your GPS module unusable without GPS signals, you can make calls, write text messages, etc.