Mobile navigation means that mobile phones need to have both general communication and navigation functions. There are many phones with navigation functions, and when choosing a navigation phone, the key is to pay attention to the following points:

　　1. Is the screen large enough? Because the screen is too small to see clearly and inconvenient to use.

　　2. Is there an electronic dog function? The so-called electronic dog function is the reminder function of the monitoring system, which can remind you of the speed monitoring device and the speed limit when the vehicle is moving. It can also remind you that there is a camera in front of you, do not run red lights, and other reminders, which are very practical.

　　3. The map needs to be updated because there are changes in the roads every year, such as the construction of new roads, adjustments to single and double lanes, etc. Therefore, the navigation map in the mobile phone also needs to change accordingly, otherwise it will be very inconvenient.

　　4. Determine whether it is a GPS phone or an A-GPS phone. GPS phones have higher accuracy, while A-GPS phones have slightly lower accuracy.

　　5. Confirm if there will be any other expenses incurred during the use of mobile navigation, such as network traffic fees or GPS software usage fees.

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