Cannot position for a long time

If the GPS is active, but the terminal cannot be positioned for long time, please check the terminal.

1.Is the GPS signal normal?
2.The upside of the terminal should be installed with face toward the sky.
3.The GSM and GPS signal may be weakened if the terminal is installed in the place with electromagnetic wave absorption material, more attention should be paid if there is metal thermal insulation layer or heating layer on the front windshield, so that the position accuracy will decline, and the severe ones will not be positioned.