1. Introduction
The MiCODUS Mini OBD GPS Tracker 4G MV33G is a compact and powerful vehicle tracking device designed for real-time positioning, anti-theft protection, and driving behavior monitoring. It operates on both 4G LTE and 2G GSM networks, ensuring reliable connectivity. With its plug-and-play design, it's easy to install and hide, providing peace of mind for vehicle owners.

2. Package Contents
Please check the package contents upon receipt:
- MiCODUS Mini OBD GPS Tracker 4G MV33G
- User Manual V1.0

3. Setup Guide
3.1 SIM Card Installation and Activation
The MV33G tracker requires a 4G LTE & 3G WCDMA data-only SIM card for network communication. If you purchased the device with a Spionlink IoT SIM card, follow these steps:
- Install the Spionlink SIM card into the device.
- Top up the SIM via the website: www.spionlink.com or by scanning the QR code on the SIM card.
- Connect the tracker to the OBD port for power supply.
- Wait 5-8 minutes for the device to go online.
Important Note:
- The Spionlink SIM card is data-only and does not support SMS or call functions.
- It comes with 1MB free data for testing; subsequent usage requires topping up.
- Spionlink SIM cards are compatible only in specific regions: Russian Federation, Belgium, Bulgaria, Cyprus, Croatia, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom, Switzerland, USA, Canada, Mexico, Puerto Rico. If you are outside these countries, please purchase a compatible data-only SIM card locally.


3.2 Device Installation
The MV33G features a compact, plug-and-play design for convenient installation into your vehicle's OBD2 port. Its small size allows for easy hiding.

The MV33G is applicable to most cars in the market with an OBD2 interface.

4. Operating Instructions
4.1 Network Connectivity
The MV33G works with the latest 4G LTE network and can fall back to the 2G GSM network, ensuring high-speed data upload and stable performance. This eliminates concerns about 2G network shutdowns.

4.2 Tracking Platform and APP
The MiCODUS MV33G offers a free and practical tracking software accessible via web platform (www.micodus.net) and mobile APP (iOS & Android). This platform provides:
- LIFETIME FREE usage.
- Integrated Google Map with global coverage.
- Ability to manage multiple devices via a single, unlimited account.
- Option to apply for a free dealer account and create sub-accounts without restriction.

4.3 Real-time Tracking
You can track your vehicle in real-time on Google Maps using a cellphone, tablet, or computer. The position updates every 10 seconds, providing current location information.

4.4 Multiple Tracking Methods
The device utilizes GPS, GLONASS, and BDS for precise positioning. When satellite signals are strong, accuracy can reach 5 meters. In areas with poor or no satellite signals (e.g., underground garages), the device uses LBS (Location Based Service) via base stations, with an accuracy of 100-2000 meters.

4.5 Historical Route Playback
The server stores historical position data for up to 180 days, allowing you to review past routes and driving patterns.

4.6 Voice Monitor
If needed, you can dial the SIM number of the device to remotely monitor the voice around your car.

4.7 Anti-theft Alarms
The MV33G provides multiple anti-theft alarms to enhance vehicle security:
- Vibration Alarm: Alerts you if the vehicle experiences unusual vibrations.
- Geo-fence Alarm: Notifies you if the vehicle enters or exits a predefined geographical area.
- Displacement Alarm: Alerts you if the vehicle moves from its parked location.
- Pull Out Alarm: Triggers an alert if the device is unplugged from the OBD port.

4.8 Overspeed Alarm
Set a maximum speed limit, and the device will send an alarm message if the vehicle exceeds this speed, helping to promote safe driving habits.

4.9 Battery Detection and Alarm
The MV33G can read and display your car's battery voltage. If the voltage drops below a preset value, the device will send an alarm message, preventing unexpected battery drain.

5. Maintenance
To ensure optimal performance and longevity of your MiCODUS MV33G GPS Tracker:
- Keep the device clean and free from dust and moisture.
- Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
- Ensure the OBD port connection is secure.
- Regularly check your SIM card data balance and recharge as needed to maintain continuous tracking.
6. Troubleshooting
6.1 Device Not Going Online / No Tracking Data
- Check SIM Card: Ensure the SIM card is correctly installed and has sufficient data balance.
- Network Compatibility: Verify that your SIM card is compatible with 4G LTE and 2G GSM networks in your region.
- APN Settings: Incorrect APN settings can prevent the device from connecting to the network. If using a local SIM, you may need to configure the APN manually via SMS commands (refer to advanced user guide or contact support). Spionlink SIMs are pre-configured.
- Power Supply: Ensure the device is securely plugged into the OBD port and receiving power (vehicle ignition may need to be on).
- Initial Connection Time: Allow 5-8 minutes for the device to establish an initial connection after installation.
6.2 Inaccurate Positioning
- Satellite Signal: GPS/GLONASS/BDS accuracy is best with clear sky view. In enclosed areas (e.g., tunnels, underground parking), the device may switch to LBS, which has lower accuracy (100-2000m).
- Device Placement: Ensure the device is not obstructed by metal objects or other electronics that could interfere with GPS signals.
6.3 Alarms Not Functioning
- Configuration: Ensure all alarm settings (e.g., geo-fence boundaries, speed limits) are correctly configured in the tracking platform or APP.
- Notifications: Check your APP notification settings and phone's notification permissions to ensure alarms are received.
7. Specifications
| Feature | Specification |
|---|---|
| Product Type | 4G OBD GPS Tracker for Car |
| Model Name | MV33G |
| Brand Name | MiCODUS |
| Origin | Mainland China |
| Certification | CE, FCC |
| Item Size | 30 (L) x 34 (W) x 72 (H) mm |
| Voltage | 12 V (Operating Voltage: 9-40VDC) |
| Out Power | 0.3w |
| GPS Module | Yes |
| GPS Type | GPS Tracker |
| GNSS | GPS+GLONASS+BDS |
| Positioning Types | GNSS+LBS+AGPS |
| Accuracy | GNSS: 5-10m; LBS: 100-2000m |
| 4G Network Bands | LTE CAT1: B1/B2/B3/B4/B5/B7/8/12/13/1B8/B19/B20/B25/B26/B28/B66/B34/B38/B39/B40/B41 |
| 2G Network Bands | GSM/GPRS: 850/900/1800/1900MHz |
| Backup Battery | Rechargeable 3.7 V 80 mAh Li-ion polymer battery (Life: 1 to 4 Hours) |
| Tracking Platform | http://www.micodus.net |
| APP | MiCODUS; iOS & Android |
| Period of Use (Platform/APP) | LIFETIME FREE |
| Special Functions | Remote Control, Compact Design, Easy for Hidden, Anti-theft Alarms (Vibration, Tow, Geo-fence, Plug Out), Low Car Battery Alarm |
8. User Tips
- SIM Card Choice: If you are not in the regions supported by Spionlink SIM cards (Russian Federation, Belgium, Bulgaria, Cyprus, Croatia, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom, Switzerland, USA, Canada, Mexico, Puerto Rico), it is recommended to purchase the device tracker only and acquire a local data-only SIM card.
- Data Usage: The Spionlink SIM card is data-only and does not support SMS or calls. It includes 1MB of free data for initial testing, after which you will need to top it up for continued service.
- Tracking Platform: Take advantage of the LIFETIME FREE tracking platform and mobile application for comprehensive monitoring and management of your device.
- Remote Monitoring: The voice monitor feature allows you to dial the SIM number in the device to listen to the surroundings of your car, which can be useful in certain situations.
9. Warranty and Support
MiCODUS is committed to providing professional after-sales service. We strive to go the extra mile to ensure customer satisfaction.
- Tracking Platform & APP: The MiCODUS tracking platform (www.micodus.net) and mobile applications (iOS & Android) are provided with LIFETIME FREE usage rights.
- Customer Service: For any questions, technical assistance, or support, please refer to the contact information provided with your purchase or visit the official MiCODUS website.






