Wrong password in your SMS or wrong SMS
format
Write correct password or SMS format
The SIM has run out of credit
Replace or top up the SIM card
Insert a working SIM card. Check in phone that the SIM can send SMS
message
Check in phone that the SIM can send SMS message. Replace SIM card if
needed.
Remove PIN code by inserting SIM in your phone and deleting the code
Inspect SIM, clean the contacts. If re-inserting does not help try another to
see if it will work
If you are in a different country your SIM account must have roaming
enabled
Error connecting GSM antenna
Make sure the GSM antenna is connected to the GSM interface
Problem: SMS received starts with ‘Last…’
Unit does not have clear view of the sky
Move the antenna of the unit to a location where the sky is visible
VT300 is in an inner place
Wait for the target to come out
Recharge the unit and the GPS will start working
Error connecting GPS antenna
Make sure the GPS antenna is connected to the GPS interface
Problem: Unit Fails to Connect to Server via GPRS
SIM card in VT300 does not support GPRS
function
Enable SIM card GPRS function
GPRS function of VT300 is turned off
Turn on GPRS function of VT300
Incorrect IP address or PORT
Get the right IP address and PORT and reset to VT300
Move the unit to a location with good GSM reception
Problem: Unit will not turn on
Wiring was not connected properly
Check and make sure wiring connection is in order
Problem: Unit will not respond to SMS
GSM antenna was not installed properly
Make VT300 connected to GSM network
Some GSM networks slow down during peak time or when they have
equipment problems
Wrong password in your SMS or wrong SMS
format
Write correct password or SMS format
The SIM in VT300 has run out of credit
Replace or top up the SIM card
Insert a working SIM card. Check in phone that the SIM can send SMS
message
Check in phone that the SIM can send SMS message. Replace SIM card if
needed