The GPS device, if it is only the longitude and latitude obtained, there is no requirement for the two, this is the same as the radio, which can separately receive the position information broadcast of the antenna GPS satellite, and then decode it, using the time difference between the arrival of at least four satellites to calculate the latitude and longitude and altitude.

　　First, in terms of positioning, there is no difference between mobile phone GPS and car GPS locator. But many people think that mobile devices need to be connected to the Internet to locate, and the car does not need to. As has been said above, as long as the gps is on, no sim card is inserted, and no wifi is able to get latitude and longitude information. Because the mobile phone is generally used online map, you need to download the Internet, and then display it, if you do not have the Internet, you cannot display it. Since the maps are built offline, the car GPS locator can display the map correctly without the need for networking.

　　Second, in terms of signal, the car GPS locator is indeed higher than the mobile phone GPS, and the receiving antenna of the mobile phone and the car GPS is not a performance level.

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