1. Check the mobile phone positioning service and authority settings

　　Enter the settings-security and privacy-positioning service to ensure that the positioning service of the mobile phone is turned on, and the positioning authority of the third-party application is opened. Support the model of the positioning mode, please set it to: high accuracy.

　　2. Check whether there is a signal cover in the location of the inspection

　　In the place where the high -rise buildings, indoor, valley, tunnels and other places are seriously obstructed, the GPS signal receiving will be affected, resulting in inaccurate positioning. It is recommended to use observation to open places.

　　3. Confirm whether to use third -party magnetic or metal accessories

　　Please check if you use metal protective cases, magnetic suction cases, magnetic stents and other accessories. Metals and magnetic materials are easy to interfere with and shield the GPS signal receiving. It is recommended that you remove the accessories and re -position it.

　　4. Check whether it is affected by third -party virtual positioning software

　　Please check whether a third -party virtual positioning software or punch -in software is installed in the mobile phone. If you use such software, please restart your mobile phone or uninstall the software.

　　5. Comparison test verification

　　Driving scene, when the car is in a state of launch, if the navigation signal in the car is weak, the comparison observation of the navigation signal strength outside the car is affected by the interference of the electronic equipment in the car or the car glass film. In addition, different map software is used to determine whether it is the software itself.

　　6. Upgrade system version

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