If you want to start navigating in the house, there may be a connection problem. Thick building walls can interfere with the signal. A phone case made of the wrong material can also cause connection problems. Remove the lid and try again. Of course, the signal may also be disturbed due to the reflection of nearby signals or other external signals (for example, under a telephone pole, etc.). However, if you absolutely cannot receive the signal, no matter what you do, you should test whether the antenna located by the gps in your smartphone is faulty. You can do this through the GPS test app. Technically, it depends on the way the signal is. It is composed of electromagnetic waves and can react with the basic components of obstacles. Therefore, the longer the signal wave, the thicker the obstacle must be. However, the wave may also be too small to "interleave" between molecules. In fact, everything that usually interferes with shortwave and longwave radios or model-building trailers can also have a negative impact on GPS signals, and signal jammer interference is affected by the above factors.

A cell phone jammer is a jamming transmitter that emits a weak radio signal to separate the connection between the cell phone and the radio base station. The interference effects can be digitally controlled to create quiet areas in restricted places. HandyBlocker is especially suitable for administrative offices, meeting rooms, conference centers, corporate headquarters, libraries, cinemas, places of worship, concert halls, high-end restaurants, educational institutions. Mobile jammers provide the ultimate solution to the above problems: mobile phones are often in meetings, Performances and other inappropriate circumstances sounded. The following are some places where mobile phones are not usually used: movie theaters, concert halls, theater records, recording studios, libraries, conference rooms, lecture halls, high-end restaurants, etc. It is a good choice to use places Yin in these places.