11
check them, you can check SIM card following next
steps:
1
）
call SIM card of device and check if you can hear
connecting ring.
2
）
Check if vehicle is in the area where there is no
GSM or LTE CAT M1/NB2 signal.
3
）
Check if one device or all devices are offline in
the area . If all devices are offline, you should ask
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 data transferring is closed or
not.
6
）
Inquiry parameters of device via commands and
check replied parameters.
6.3 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 & LTE CAT M1/NB2 and GPS signal
