User's Manual

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operator If network is OK.
4）Check if SIM card has enough balance.
5）If device becomes offline on the last day of one
month, please check GPRS is closed or not.
6）Inquiry parameters of device via commands and
check replied parameters.
9.3 No positioned
If the GPS is active, but device cannot be
positioned for long time, please check device:
1）If the vehicle is in the place where there is no
GPS signal.
2）The upside of device should be installed with
face toward the sky.
3）The GSM and GPS signal may be weakened if
device is installed in the place with electromagnetic
wave absorption material(such as metal blocks),
special 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.
9.4 Position drift
Serious position drift will be found in places where
GPS signal is poor. Please drive the vehicle to the