Concox GT03C User Manual page 14

Bad reception
The terminal can not
switch on
Can not make
monitoring
can not connect to the
network
can not charge
Can not check
address information
Near the tall building or in the basement
No battery power
No preset SOS numbers
voice
SIM card is without Caller ID function
SIM card is not inserted correctly
The sheet mental of SIM card is
dusty
Invalid SIM card
Out of GSM service area
weak signal
Voltage is out of charging range of the
charger
Non-standard charger
Poor contact
GPRS function is not activated
Can not get the position data
It is not a SOS number
Change to a place with good
signal
Change a new battery
Set SOS numbers
Activate the function
Check the SIM card
Wipe it clean
Contact your internet service
provider
Move back to the GSM service
covered area.
Try again in a strong signal area
Change to the proper voltage
Use charger that come with the
package
Check if the plug is in
Please contact the SIM card
operator to activate GPRS
①restart the device
②contact with your distributor
set SOS number