WhatsGPS S288G, Руководство пользователя

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3.If the device’ GPS function is normal, but can not
locate for a long time, please check whether the
installation setup of device is correct:
1)Please make sure the GPS antenna face is up;
2)Please make sure there is no electromagnetic wave-
absorbent object (metal) above the device, especially
the thermal-protective coating on the windshield, it
may affect the GPS reception of the device;