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Get Version No. and Serial No.
W******,600
W000000,600
Remarks: to get the version and serial number of tracker’s firmware
Get IMEI
W******,601
W000000,601
Remarks: to get IMEI of the tracker
Reboot GSM
W******,901###
W000000,901###
Remarks: to reboot the GSM module of the tracker
Reboot GPS
W******,902###
W000000,902###
Remarks: to reboot the GPS module of the tracker
Initialization
W******,990,099###
W000000,990,099###
Remarks: Turn on the device, press the SOS button for five times continuously and the red LED will be on, and then send (within
120 seconds) this SMS to the tracker to make all settings (except for the password) back to factory default.
### is the ending character.
Password Initialization
W888888,999,666
W888888,999,666
Remarks: In case you forget your password, turn on the tracker, press the SOS button for five times continuously and the red
LED will be on, and then send this SMS (within 120 seconds) to the tracker to make the password back to factory default
(000000).
Annex 2. Troubleshooting
Problem: Unit will not turn on
Possible Cause:
Resolution:
Wiring was not connected properly
Check and make sure wiring connection is in order.
Battery needs charging
Recharge battery
Problem: Unit will not respond to SMS
Possible Cause:
Resolution:
GSM antenna was not installed properly
Make VT300 connected to GSM network.
GSM Network is slow
Some GSM networks slow down during peak time or when they have
equipment problems.
Unit is sleeping
Cancel sleeping mode
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
No SIM card
Insert a working SIM card. Check in phone that the SIM can send SMS
message.
SIM card has expired
Check in phone that the SIM can send SMS message. Replace SIM card if
needed.
SIM has PIN code set
Remove PIN code by inserting SIM in you phone and deleting the code.
