Teltonika FMC125 Installation guide

FMC125
Advanced LTE terminal with GNSS and
LTE/GSM connectivity, RS485/RS232
interfaces and backup battery
Quick Manual v2.3

Quick Manual v2.3 // FMC125 2
CONTENT
Know your device................................................................................................................................................................................................3
Pinout ...................................................................................................................................................................................................................4
WIRING SCHEME .................................................................................................................................................................................................5
Set up your device ..............................................................................................................................................................................................6
PC Connection (Windows)..................................................................................................................................................................................7
How to install USB drivers (Windows) ..............................................................................................................................................................7
Conguration.......................................................................................................................................................................................................8
Quick SMS conguration................................................................................................................................................................................. 10
Mounting recommendations.......................................................................................................................................................................... 12
Basic characteristics ........................................................................................................................................................................................ 13
LED indications................................................................................................................................................................................................. 13
Electrical characteristics.................................................................................................................................................................................. 16
Safety information .......................................................................................................................................................................................... 18
Certication and Approvals ............................................................................................................................................................................ 19
Warranty ........................................................................................................................................................................................................... 20
Warranty disclaimer ........................................................................................................................................................................................ 20

Quick Manual v2.3 // FMC125 3
KNOW YOUR DEVICE
2X6
SOCKET
STATUS
LED
DUAL SIM
SLOT
BATTERY
SOCKET
NAVIGATE
LED
MICRO
USB
TOP VIEW TOP VIEW (WITHOUT COVER)BOTTOM VIEW (WITHOUT COVER)

Quick Manual v2.3 // FMC125 4
PIN NUMBER PIN NAME DESCRIPTION
1VCC (10-30)V DC
(+)
Power supply (+10-30
V DC).
2AIN 1/DIN 2
Analog input, channel 1.
Input range: 0-30 V DC /
Digital input, channel 2.
3 RS232 – RX Input for data receive
through RS232
4 RS232 – TX Output for data transmit
through RS232
5 DIN 1 Digital input, channel 1.
6 INPUT 6 TX EXT (LVCAN – TX).
7 GND (-) Ground pin. (10-30) V DC
8 DOUT 1
Digital output, channel
1. Open collector output.
Max. 0,5 A DC.
9RS485 – A Signal A wire for RS485
10 RS485 – B Signal B wire for RS485
11 1WIRE DATA Data for 1–Wire devices.
12 INPUT 5 RX EXT (LVCAN - RX).
PINOUT
RS485-A
RS485-B
1WIRE DATA
GND
DOUT1
INPUT 5
RS232-RX
RS232-TX
DIN1
+10...30 V DC
AIN1
INPUT 6
10
9
8
7
11
12
4
3
2
1
5
6
FMC125 2x6 socket pinout

Quick Manual v2.3 // FMC125 5
WIRING SCHEME
30
8586
87a
87
BUFFERED
TRANSPARENT
MODE
BUZZER
FUEL GAUGE
STARTER
IBUTTON
POWER SUPPLY
10 - 30V DC
ANALOG
LLS SENSOR
RS232
LLS SENSOR
MULTIPLE RS485
LLS SENSORS
CAN-CONTROL
ALARM BUTTON
GARMIN
RFID
IGNITION
DETECTION
RS485-A
RS485-B
1WIRE DATA
GND
DOUT1
INPUT 5
RS232-RX
RS232-TX
DIN1
+10...30 V DC
AIN1
INPUT 6
10
9
8
7
11
12
4
3
2
1
5
6
IRIDIUM EDGE®

Quick Manual v2.3 // FMC125 6
SET UP YOUR DEVICE
HOW TO INSERT MICRO-SIM CARD AND CONNECT THE BATTERY
4
1COVER REMOVAL 3BATTERY CONNECTION 2MICRO-SIM CARD INSERT ATTACHING COVER BACK
Gently remove FMC125
cover using plastic pry tool
from both sides.
Insert SIM card as shown
with PIN request disabled
or read our Wiki1 how to
enter it later in Teltonika
Congurator2. Make sure
that SIM card cut-o corner
is pointing outward from
slot. SIM slot 1 is closer to
PCB, SIM slot 2 is the top
one.
1 wiki.teltonika-gps.com/view/
FMC125_Security_info
2 wiki.teltonika-gps.com/view/
Teltonika_Congurator
Connect battery as shown to
device. Position the battery
in place where it does not
obstruct other components.
After conguration, see “PC
Connection (Windows)1”,
attach device cover back.
1 Page 7, "PC Connection
(Windows)"

Quick Manual v2.3 // FMC125 7
PC CONNECTION (WINDOWS)
HOW TO INSTALL USB DRIVERS (WINDOWS)
1. Please download COM port drivers from 1.
2. Extract and run .
3. Click in driver installation window.
4. In the following window click button.
5. Setup will continue installing the driver and eventually the conrmation window will appear. Click to complete the setup.
teltonika.lt/downloads/en/FMC125/TeltonikaCOMDriver.zip
1. Power-up FMC125 with DC voltage (10 – 30 V) power supply using supplied power cable. LED’s should start blinking, see “LED
indications1”.
2. Connect device to computer using Micro-USB cable or Bluetooth connection:
• Using Micro-USB cable
• You will need to install USB drivers, see “How to install USB drivers (Windows)2”
• Using Bluetooth
• FMC125 Bluetooth is enabled by default. Turn on Bluetooth on your PC, then select Add Bluetooth or other device >
Bluetooth. Choose your device named – “FMC125_last_7_imei_digits”, without LE in the end. Enter default password 5555,
press Connect and then select Done.
3. You are now ready to use the device on your computer.
1 wiki.teltonika-gps.com/view/FMC125_LED_status
2 Page 6, "How to install USB drivers"

Quick Manual v2.3 // FMC125 8
MS .NET REQUIREMENTS
Operating system MS .NET Framework version Version Links
Windows Vista
Windows 7
Windows 8.1
Windows 10
MS .NET Framework 4.6.2 32 and 64 bit www.microsoft.com1
1 dotnet.microsoft.com/en-us/download/dotnet-framework/net462
At rst FMC125 device will have default factory settings set. These settings should be changed according to the users needs. Main
conguration can be performed via Teltonika Congurator software. Get the latest Congurator version from here. Congurator
operates on Microsoft Windows OS and uses prerequisite MS .NET Framework. Make sure you have the correct version installed.
CONFIGURATION

Quick Manual v2.3 // FMC125 9
Downloaded Congurator will be in compressed archive.
Extract it and launch Congurator.exe. After launch software
language can be changed by clicking 🌐 in the right bottom
corner.
Conguration process begins by pressing on connected device.
FMC125
Various Status window1 tabs display information about GNSS2,
GSM3, I/O4, Maintenance5and etc. FMC125 has one user
editable prole, which can be loaded and saved to the device.
After any modication of conguration the changes need to
be saved to device using Save to device button. Main buttons
oer following functionality:
Load from device – loads conguration from device.
Save to device – saves conguration to device.
Load from le – loads conguration from le.
Save to le – saves conguration to le.
Update rmware – updates rmware on device.
Read records – reads records from the device.
Reboot device – restarts device.
Reset conguration – sets device conguration to
default.
Most important congurator section is GPRS – where all
your server and GPRS settings6 can be congured and Data
Acquisition7 – where data acquiring parameters can be
congured. More details about FMC125 conguration using
Congurator can be found in our Wiki8.
After connection to Congurator Status window will be
displayed.
FMC125
1 wiki.teltonika-gps.com/view/FMC125_Status_info
2 wiki.teltonika-gps.com/view/FMC125_Status_info#GNSS_Info
3 wiki.teltonika-gps.com/view/FMC125_Status_info#GSM_Info
4 wiki.teltonika-gps.com/view/FMC125_Status_info#I.2FO_Info
5 wiki.teltonika-gps.com/view/FMC125_Status_info#Maintenance
6 wiki.teltonika-gps.com/index.php?title=FMC125_GPRS_settings
7 wiki.teltonika-gps.com/index.php?title=FMC125_Data_acquisition_
settings
8 wiki.teltonika-gps.com/index.php?title=FMC125_Conguration

Quick Manual v2.3 // FMC125 10
QUICK SMS CONFIGURATION
Default conguration has optimal parameters present to ensure best performance of track quality and data usage.
Quickly set up your device by sending this SMS command to it:
Note: Before SMS text, two space symbols should be inserted.
GPRS SETTINGS:
2001 – APN
2002 – APN username (if there are no APN username,
empty eld should be left)
2003 – APN password (if there are no APN password,
empty eld should be left)
SERVER SETTINGS:
2004 – Domain
2005 – Port
2006 – Data sending protocol (0 – TCP, 1 – UDP)
« setparam 2001:APN;2002:APN_username;2003:APN_password;2004:Domain;2005:Port;2006:0»
1 2 3 4 5 6
1
2
3
4
5
6

Quick Manual v2.3 // FMC125 11
DEFAULT CONFIGURATION SETTINGS
MOVEMENT AND IGNITION DETECTION: DEVICE MAKES A RECORD ON MOVING
IF ONE OF THESE EVENTS HAPPEN:
SPEED DIFFERENCE
between last coordinate
and current position is
greater than 10 km/h
VEHICLE DRIVES
100 meters
VEHICLE TURNS
10 degrees
PASSES
300 seconds
After successful SMS conguration, FMC125 device will synchronize time and update records to congured server. Time intervals
and default I/O elements can be changed by using Teltonika Congurator1or SMS parameters2.
1 wiki.teltonika-gps.com/view/Teltonika_Congurator
2 wiki.teltonika-gps.com/view/Template:FMB_Device_Family_Parameter_list
VEHICLE MOVEMENT
will be detected by
accelerometer
DEVICE MAKES A
RECORD ON STOP IF:
1 HOUR PASSES
while vehicle is
stationary and
ignition is o
IGNITION
will be detected by
vehicle power voltage
between 13,2 – 30 V
RECORDS SENDING TO
SERVER:
EVERY 120 SECOND
it is sent to the server
If device has made a
record

Quick Manual v2.3 // FMC125 12
MOUNTING RECOMMENDATIONS
CONNECTING WIRES
• Wires should be fastened to the other wires or non-moving parts. Try to avoid heat emitting and moving objects near the
wires.
• The connections should not be seen very clearly. If factory isolation was removed while connecting wires, it should be applied
again.
• If the wires are placed in the exterior or in places where they can be damaged or exposed to heat, humidity, dirt, etc., additional
isolation should be applied.
• Wires cannot be connected to the board computers or control units.
CONNECTING POWER SOURCE
• Be sure that after the car computer falls asleep, power is still available on chosen wire. Depending on car, this may happen in
5 to 30 minutes period.
• When module is connected, measure voltage again to make sure it did not decrease.
• It is recommended to connect to the main power cable in the fuse box.
• Use 3A, 125V external fuse.
CONNECTING IGNITION WIRE
• Be sure to check if it is a real ignition wire i. e. power does not disappear after starting the engine.
• Check if this is not an ACC wire (when key is in the rst position, most of the vehicle electronics are available).
• Check if power is still available when you turn o any of vehicles devices.
• Ignition is connected to the ignition relay output. As alternative, any other relay, which has power output when ignition is on,
may be chosen.
CONNECTING GROUND WIRE
• Ground wire is connected to the vehicle frame or metal parts that are xed to the frame.
• If the wire is xed with the bolt, the loop must be connected to the end of the wire.
• For better contact scrub paint from the spot where loop is going to be connected.

Quick Manual v2.3 // FMC125 13
BEHAVIOUR MEANING
Permanently
switched on GNSS signal is not received
Blinking every
second Normal mode, GNSS is working
O
GNSS is turned o because:
Device is not working or Device is in
sleep mode
Blinking fast
constantly Device rmware is being ashed
BEHAVIOUR MEANING
Blinking every
second Normal mode
Blinking every two
seconds Sleep mode
Blinking fast for a
short time Modem activity
O Device is not working or Device is in
boot mode
LED INDICATIONS
NAVIGATION LED INDICATIONS
STATUS LED INDICATIONS
BASIC CHARACTERISTICS
MODULE
Name
FMC125-MBIB0: MeiG SLM320-E
with Teltonika TM2500
FMC125-MCIB0: MeiG SLM320-LA
with Teltonika TM2500
Technology LTE(CaT1)/2G(GSM/GPRS)/GNSS/
BLUETOOTH
GNSS
GNSS GPS, GLONASS, GALILEO, BEIDOU,
QZSS, AGPS
Receiver Tracking: 33
Tracking sensitivity -165 dBM
Position accuracy < 2.5 CEP
Velocity accuracy < 0.1m/s (within +/- 15% error)
Hot start < 1 s
Warm start < 25 s
Cold start < 35 s
Technology LTE Cat 1, GSM
2G bands FMC125-MBIB0: GSM: B2/B3/B5/B8
FMC125-MCIB0: GSM: B2/B3/B5/B8

Quick Manual v2.3 // FMC125 14
4G bands
FMC125-MBIB0: LTE FDD: B1/B3/B7/
B8/B20/B28 LTE-TDD:B38/B40/B41
FMC125-MCIB0: LTE FDD: B1/B2/B3/
B4/B5/B7/B8/B20/B28 LTE-TDD:B40
Data transfer
LTE: LTE FDD: Max 10Mbps (DL)/
Max 5Mbps (UL)
LTE TDD: Max 8Mbps (DL)/Max
2Mbps (UL)
GSM: GPRS: Max 85.6Kbps (DL)/Max
85.6Kbps (UL)
Data support SMS (text/data)
POWER
Input voltage range 10 – 30 V DC with overvoltage
protection
Back-up battery 170 mAh Li-Ion battery 3.7 V (0.63
Wh)
Internal Fuse 3 A, 125 V
Power consumption
At 12V < 4 mA (Ultra Deep Sleep1)
At 12V < 6 mA (Deep Sleep1)
At 12V < 12 mA (Online Deep
Sleep1)
At 12V < 19 mA (GPS Sleep1)
At 12V < 36 mA (nominal with no
load)
At 12V < 1A Max. (with full Load /
Peak)
1 wiki.teltonika-gps.com/view/FMC125_Sleep_modes
BLUETOOTH
Specication 4.0 + LE
Supported
peripherals
Temperature and Humidity
sensor2, Headset3, OBDII dongle4,
Inateck Barcode Scanner, Universal
BLE sensors support
INTERFACE
Digital Inputs 2
Digital Outputs 1
Analog Inputs 1
CAN Adapter inputs 1
1-Wire 1
RS232 1
RS485 1
GNSS antenna Internal High Gain
Cellular antenna Internal High Gain
USB 2.0 Micro-USB
LED indication 2 status LED lights
2 teltonika-gps.com/products/accessories
3 wiki.teltonika-gps.com/view/How_to_connect_Bluetooth_Hands_Free_
adapter_to_FMB_device
4 wiki.teltonika-gps.com/view/How_to_connect_OBD_II_Bluetooth_
Dongle_to_FMB_device

Quick Manual v2.3 // FMC125 15
SIM 2x SIM Card (Dual-SIM)
Memory 128MB internal ash memory
PHYSICAL SPECIFICATION
Dimensions 65 x 56,6 x 20,6 mm (L x W x H)
Weight 55 g
OPERATING ENVIRONMENT
Operating
temperature
(without battery)
-20 °C to +85 °C
Storage temperature
(without battery) -20 °C to +85 °C
Operating
temperature (with
battery)
-20 °C to +40 °C
Storage temperature
(with battery) -20 °C to +45 °C
Operating humidity 5% to 95% non-condensing
Ingress Protection
Rating IP41
Battery charge
temperature 0 °C to +45 °C
Battery discharge
temperature -20 °C to +60 °C
Battery storage
temperature
-20 °C to +45 °C for 1 month
-20 °C to +35 °C for 6 months
FEATURES
Sensors Accelerometer
Scenarios
Green Driving, Over Speeding
detection, GNSS Fuel Counter,
DOUT Control Via Call, Excessive
Idling detection, Immobilizer,
iButton Read Notication, Unplug
detection, Towing detection, Crash
detection, Auto Geofence, Manual
Geofence, Trip5
Sleep modes GPS Sleep, Online Deep Sleep,
Deep Sleep, Ultra Deep Sleep6
Conguration and
rmware update
FOTA Web7, FOTA, Teltonika
Congurator8 (USB, Bluetooth),
FMBT mobile application
(Conguration)
SMS Conguration, Events, DOUT
control, Debug
GPRS commands Conguration, DOUT control, Debug
Time
Synchronization GPS, NITZ, NTP
5 wiki.teltonika-gps.com/view/FMC125_Features_settings
6 wiki.teltonika-gps.com/view/FMC125_Sleep_modes
7 wiki.teltonika-gps.com/view/FOTA_WEB
8 wiki.teltonika-gps.com/view/Teltonika_Congurator

Quick Manual v2.3 // FMC125 16
Fuel monitoring
LLS (Analog), LV-CAN2009, ALL-
CAN30010, OBDII dongle11, RS232/
RS485 fuel sensor, CAN-CONTROL12
Ignition detection
Digital Input 1, Accelerometer,
External Power Voltage, Engine RPM
(CAN Adapters, OBDII dongle)
RS232
Log Mode, NMEA, LLS, LCD, RFIH
HID/MF7, Garmin FMI, TCP SCII/
Binary
RS485 Log Mode, NMEA, LLS, TCP SCII/
Binary
9 teltonika-gps.com/products/trackers/can-obd-data/lv-can200
10 teltonika-gps.com/products/trackers/can-obd-data/all-can300
11 wiki.teltonika-gps.com/view/How_to_connect_OBD_II_Bluetooth_
Dongle_to_FMB_device
12 teltonika-gps.com/products/trackers/can-obd-data/can-control
ELECTRICAL
CHARACTERISTICS
CHARACTERISTIC
DESCRIPTION
VALUE
MIN. TYP. MAX. UNIT
SUPPLY VOLTAGE
Supply Voltage
(Recommended
Operating Conditions)
+10 +30 V
DIGITAL OUTPUT (OPEN DRAIN GRADE)
Drain current (Digital
Output OFF) 120 µA
Drain current
(Digital Output ON,
Recommended
Operating Conditions)
0.1 0.5 A
Static Drain-Source
resistance (Digital
Output ON)
400 600 mΩ
DIGITAL INPUT
Input resistance (DIN1) 47 kΩ
Input resistance (DIN2) 39 kΩ

Quick Manual v2.3 // FMC125 17
Input voltage
(Recommended
Operating Conditions)
0 30 V
Input Voltage threshold
(DIN1) 7.5 V
Input Voltage threshold
(DIN2) 2.5 V
ANALOG INPUT
Input voltage
(Recommended
Operating Conditions),
Range 1
0 +10 V
Input resistance,
Range 1 150 kΩ
Measurement error on
12V, Range 1 0.9 %
Additional error on 12
V, Range 1 108 mV
Measurement error on
30 V, Range 1 0.33 %
Additional error on 30
V, Range 1 88 mV
Input Voltage
(Recommended
Operating Conditions),
Range 2
0 +30 V
Input resistance,
Range 2 150 kΩ
Measurement error on
12 V, Range 2 0.9 %
Additional error on 12
V, Range 2 108 mV
Measurement error on
30 V, Range 2 0.33 %
Additional error on 30
V, Range 2 88 mV
OUTPUT SUPPLY VOLTAGE 1-WIRE
Supply voltage +4.5 +4.7 V
Output inner resistance 7 Ω
Output current (Uout
> 3.0 V) 30 mA
Short circuit current
(Uout = 0) 75 mA
CHARACTERISTIC
DESCRIPTION
VALUE
MIN. TYP. MAX. UNIT
CHARACTERISTIC
DESCRIPTION
VALUE
MIN. TYP. MAX. UNIT

Quick Manual v2.3 // FMC125 18
This message contains information on how to operate FMC125
safely. By following these requirements and recommendations,
you will avoid dangerous situations. You must read these
instructions carefully and follow them strictly before operating
the device!
• The device uses SELV limited power source. The nominal
voltage is +12 V DC. The allowed voltage range is +10…+30
V DC.
• To avoid mechanical damage, it is advised to transport
the device in an impact-proof package. Before usage,
the device should be placed so that its LED indicators are
visible. They show the status of device operation.
• When connecting the 2x6 connector wires to the vehicle,
the appropriate jumpers of the vehicle power supply
should be disconnected.
• Before unmounting the device from the vehicle, the 2x6
connector must be disconnected. The device is designed
to be mounted in a zone of limited access, which is
inaccessible to the operator. All related devices must meet
the requirements of EN 62368-1 standard.
• The device FMC125 is not designed as a navigational
device for boats.
SAFETY INFORMATION Do not disassemble the device. If the device is
damaged, the power supply cables are not isolated
or the isolation is damaged, DO NOT touch the
device before unplugging the power supply.
All wireless data transferring devices produce
interference that may aect other devices which are
placed nearby.
The programming must be performed using a PC
with autonomic power supply.
The device must be rmly fastened in a predened
location.
The device must be connected only by qualied
personnel.
Installation and/or handling during a lightning storm
is prohibited.
The device is susceptible to water and humidity.
Risk of explosion if battery is replaced by an
incorrect type. Dispose of used batteries according
to the instructions.
Battery should not be disposed of with general
household waste. Bring damaged or worn-out
batteries to your local recycling center or dispose
them to battery recycle bin found in stores.

Quick Manual v2.3 // FMC125 19
CERTIFICATION AND APPROVALS
This sign on the package means that it is necessary
to read the User‘s Manual before your start using the
device. Full User‘s Manual version can be found in
our Wiki1.
1 wiki.teltonika-gps.com/index.php?title=FMB920
Hereby, Teltonika declare under our sole
responsibility that the above described product
is in conformity with the relevant Community
harmonization: European Directive 2014/53/EU
(RED).
This sign on the package means that all used
electronic and electric equipment should not be
mixed with general household waste.
The Declaration EAC and the Certicate EAC in
conformity with the technical regulation TR CU of
the EurAsEC Customs Union are EAC certication
documents issued by independent organizations.
Such organizations perform their function through
laboratories accredited to the public agencies
in charge of the supervision of metrology and
standardization in the three countries of the
EAC Custom Union, joining at the moment the
certication system : Russia, Belarus, Kazakhstan,
Armenia and Kyrgyzstan.
REACH
REACH addresses the production and use of
chemical substances, and their potential impacts
on both human health and the environment. Its
849 pages took seven years to pass, and it has been
described as the most complex legislation in the
Union's history and the most important in 20 years.
It is the strictest law to date regulating chemical
substances and will aect industries throughout the
world.
E-Mark and e-Mark are the European conformity
marks issued by the transport sector, indicating
that the products comply with relevant laws and
regulations or directives. Vehicles and related
products need to go through the E-Mark certication
process to be legally sold in Europe.
The RoHS1 is a directive regulating the manufacture,
import and distribution of Electronics and Electrical
Equipment (EEE) within the EU, which bans from use
10 dierent hazardous materials (to date).
SIRIM QAS International Sdn. Bhd. is Malaysia’s
leading testing,inspection and certication body.
CITC mandates that network-based devices must
support 4G/LTE technology as a prerequisite for
approval of such equipment in Saudi Arabia. Hence,
2G and 3G only devices can no longer be approved
and certied in the Kingdom.
The Australian Standard AS/NZS 4417.1 and AS/NZS
4417.2 Marking of electrical products to indicate
compliance with regulations – General rules for use
of the mark provides general requirements for the
use of the RCM including location of the marking on
the equipment and its dimensional requirements.
JATE certication is a telecommunications
equipment compliance certication. This
certication is for communications equipment
in Japan, ensuring that the equipment meets the
Japanese "Electric Communications Business Law".
All wireless products connected to public phones or
telecommunications networks must apply for JATE
certication. In simple terms, JATE certication is a
Japanese access certication.

Quick Manual v2.3 // FMC125 20
The primary function of the TRC is to regulate the
telecommunications and information technology
(ICT) service sectors, as well as the postal sector
according to the Postal Law No 34 of 2007.
TRA stands for Telecommunication Regulatory
Authority. Its main task is to approve radio
technology products for UAE (United Arab Emirates).
Manufactures in respective elds distribute
products.
The Security Industry Regulatory Agency (SIRA) is
an agency within the Government of Dubai that
protects lives and properties by suggesting new laws
and regulations, applying smart systems, training
security cadres, and inspecting various types of
facilities.
The Independent Communications Authority of
South Africa (ICASA) is the ocial regulator of the
South African communications, broadcasting and
postal services sectors.
TELEC certication complies with the Radio Law
of Japan, and the specic test specications are in
compliance with MIC (Ministry of Internal Aairs
and Communications) Notice No. 88 regulations.
According to the requirements of the Japanese
Radio Law, the production, sale, and operation of
wireless equipment in Japan must comply with the
technical regulations approved by the MIC, and it is
mandatory to apply for a type approval certicate
for radio equipment (ie, TELEC certication).
CHECK ALL CERTIFICATES
All newest certicates may be found in our Wiki2.
2 wiki.teltonika-gps.com/view/FMC125_Certication_%26_Approvals
DECLARATION OF IMEI ASSIGNMENT
The IMEI number is used by a GSM network to identify valid
devices and therefore can be used for stopping a stolen phone
from accessing that network. For example, if a mobile phone is
stolen, the owner can call their network provider and instruct
them to blacklist the phone using its IMEI number. This renders
the phone useless on that network and sometimes other
networks too, whether or not the phone's subscriber identity
module (SIM) is changed.