It is best to go to a professional navigation store to upgrade. I often use mobile navigation, and mobile navigation is quick to upgrade and easy to use. Now use Tencent map. This mobile navigation not only has the car navigation function of route inquiry and voice navigation, but also has a variety of map modes. Through the street view map, users can also check the real scene of the destination in advance, so as to find the destination more accurately, download offline data packets and realize zero-flow voice navigation.