It is important to use jammer gps nowadays - no matter cell phone or GPS jammers, they are important if you want to keep your private life. In the modern world there are so many electronic technologies, military develops and systems that it is completely possible that everyone is being constantly tracked.
It is known that the phone signal is influenced by your indoor position, weather condition or even time. According to the experience of the scientists if you change the value to 10dbm you will be able to reach the highest power. In that way the distance is doubled and you will be able to catch the signal from places that you were not before. Scientists do not recommend to this often because it can be dangerous for the technology. Anyway, there are some occasions that may allow you to do it - for example some important military operation. By doing this procedure you will be able to catch a signal from distances far away.
Anyway the cell phone jammer gps can not work constantly without stopping. And it can block approximately 98 percent of the area. It lifetime is around 8 hours. The bad news here is that no matter what are the environment changes the cell phone jammer can not always block all cell phones around - just most of them but there will always be 2 percent that will work.
By the way, jamming technology provides not only GSM jammers, but GPS, WiFi, Bluetooth and other jammers that block almost any frequency that is used nowadays.