1. Introduction
Thank you for choosing the SinoTrack ST-901AL 4G GPS Tracker. This manual provides detailed instructions on how to set up, operate, and troubleshoot your device to ensure smooth and correct functionality. The ST-901AL is a 4G+2G compatible GPS tracker designed for real-time tracking of cars, motorcycles, and other vehicles, offering features like remote cut-off of oil/power and a free tracking application.

SinoTrack ST-901AL 4G GPS Tracker (front view)
2. Specifications
| Feature | Description |
|---|---|
| Model Name | ST-901AL 4G |
| Brand Name | SinoTrack |
| Network | 2G+4G |
| Voltage | 12 V |
| Out Power | 0.02W |
| Battery Life | 1 To 4 Hours (Built-in 150mAh/120mAh Battery) |
| Screen Size | No screen |
| GPS Module | Yes |
| Special Features | Internet Connected |
| GPS Type | GPS Tracker |
| Certification | CE, RoHS |
| Dimensions (L x W x H) | Approx. 3.14 x 1.37 x 0.66 inches (80 x 35 x 17 mm) |
| Package Weight | 0.2 kg |
| Package Dimensions (L x W x H) | 10 x 10 x 5 cm |

Product dimensions and key features overview
3. Setup
3.1. SIM Card Installation
- Choose a Micro SIM card without a PIN code. Normal SIM and Nano SIM cards are not compatible.
- Carefully open the top cover of the tracker.
- Insert the Micro SIM card into the slot as shown in the diagram. Ensure it is properly seated.
- Close the top cover securely.

Steps for SIM card insertion

SIM card slot detail with indicators
3.2. Initial Power-Up and Placement
- Connect the tracker to an external power supply (e.g., vehicle battery).
- Place the device outdoors for approximately 30 seconds. The LED lights will remain lit, indicating normal operation.
- For optimal GPS signal reception, ensure the GPS antenna side of the tracker faces the clear sky. Avoid placing it under metal. Glass and plastic covers are acceptable.

Recommended GPS antenna placement for best signal
3.3. Wiring Diagram
Connect the wires according to the following diagram. The optional relay allows for remote control of the vehicle's oil and circuit.

Wiring diagram for the GPS tracker, including optional relay for fuel pump control
3.4. Activating Online Tracking (SMS Configuration)
To connect your tracker to the online platform, send the following SMS commands to the tracker's SIM card number:
- Set GPRS Mode: Send
7100000(Password is 0000 by default). Reply:SET OK. - Set IP and Port: Send
8040000 45.112.204.246 8090. Reply:SET OK. - Set APN: Send
8030000 APN. (ReplaceAPNwith your SIM card's Access Point Name). Reply:SET OK.
If your APN requires a username and password, send:8030000 APN APNuser APNpassword.
You can find your SIM card's APN by contacting your SIM card provider or by checking online resources like apn.how.
4. Operating Instructions
4.1. Tracking Platform & Mobile App
The SinoTrack GPS tracker offers a lifetime free tracking platform and mobile application for real-time monitoring and history route playback.
- Website Tracking (PC Version): Access the platform at www.sinotrackpro.com or 45.112.204.246.
- Mobile Application (APP): Search for "SinoTrack PRO" on the App Store (iOS) or Google Play (Android), or scan the QR code provided in the images.
Login Credentials:
- Server: Pro.SinoTrack
- User Name: Your device's ID number (found on the tracker)
- Password: 123456 (default, please change after first login)

Overview of the SinoTrack Lifetime Free Tracking Platform on various devices

SinoTrack PRO Mobile App login screen

SinoTrack Web Tracking Platform interface
4.2. SMS Commands for Functions
The tracker can be controlled and configured via SMS commands sent to the SIM card number inside the device. All commands require a password (default: 0000).
- Set Control Number:
Number+password+blank+serial
Example:139504434650000 1(Sets 13950443465 as the first control number with password 0000). You can set up to three control numbers. - Change Password:
777+NewPassword+OldPassword
Example:77712340000(Changes password from 0000 to 1234). - Get Location (Google Link):
669+password
Example:6690000. The tracker will reply with a Google Maps link to its current location. - Get Location by Phone Call: Dial the SIM card number in the tracker. It will reply with a Google Maps link.
- Change Time Zone:
896+password+E/W+HH
Example:8960000E00(Sets time zone to East 00, default). - Geo-Fence:
Open:211+password(e.g.,2110000)
Close:210+password(e.g.,2100000)
Set radius:005+password+distance(e.g.,0050000 1000for 1000 meters). - Over Speed Alarm:
122+password+blank+XXX(XXX is speed in KM/H, 0-999)
Example:1220000 120(Sets over speed alarm at 120 KM/H). Send1220000 0to close. - Shock Alarm:
Open:181+password+T(T is shocking time in seconds, 0-120)
Example:1810000T10(Sets shock alarm with 10-second delay).
Close:180+password(e.g.,1800000). - Cut Power Alarm: When the battery is disconnected, the tracker sends an alarm to the server and the first control number.
- ACC On/Off Alarm:
Open ACC alarm by SMS:886+password(e.g.,8860000)
Close ACC alarm by SMS:887+password(e.g.,8870000)
Open ACC alarm by phone call:888+password(e.g.,8880000)
Close ACC alarm by phone call:889+password(e.g.,8890000) - Call Mode:
Call mode on:150+password(e.g.,1500000). Alarms will call and send SMS.
Call mode off:151+password(e.g.,1510000). Alarms will only send SMS. - Set Time Interval:
ACC on:805+password+blank+T(T is interval in seconds, 10-180. 0 means close GPRS).
ACC off:809+password+blank+T(T is interval in seconds, 10-180. 0 means close GPRS).
4.3. Remote Cut Off Oil/Power (Optional)
If you have connected the optional relay, you can remotely cut off the vehicle's oil and electricity by sending an SMS command. This feature is useful in case of vehicle theft.
5. Maintenance
To ensure the longevity and optimal performance of your SinoTrack GPS tracker, follow these general maintenance guidelines:
- Keep the device clean and free from dust and debris.
- Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
- Ensure all connections are secure and free from corrosion.
- The built-in battery provides backup power for 1 to 4 hours. For continuous operation, ensure the device is connected to a stable 12V vehicle power supply.
6. Troubleshooting
If you encounter issues with your SinoTrack GPS tracker, refer to the following common problems and solutions:
| Problem | Solution |
|---|---|
| Device is not online | Check device settings by sending RCONF. Verify APN, IP, Port, and ID are correct. Ensure the SIM card has credit and GPRS plan. |
| Device shows 'unactivated' on platform | Ensure correct server (Pro.SinoTrack) and APN settings. Check SIM card for GPRS data. |
| Device shows 'offline' on platform | Check GPRS setting, IP, Port, APN. Verify SIM card has credit and internet plan. Try restarting the device. |
| Device icon is Yellow color | No valid GPS signal. Move the device to an open area to get a good GPS signal. |
| Device blue light keeps flashing | This indicates the device is searching for a GPS signal. Move to an open area. |
| Device shows China location on platform | This is the test location before sending the device. For lost GPS signal, move to an open area. |
| Device shows incorrect location | Move the device to an open area to get a good GPS signal. Check SIM card credit. |
| Device doesn't send SMS | Check SIM card support GSM or 3G network. Ensure there is a PIN code in the SIM card; if so, cancel it. Try another SIM card. |
| Device doesn't send SMS alarm | Send the Control Number first to receive SMS alarms. Then follow instructions to set the alarm. |
| Device responds SMS link to any phone | The tracker is designed to be simple to use. It does not distinguish between numbers for SMS links. |
| Device supports Change IMEI | Yes, you can change IMEI. Command: IMEI+password+IMEI number. Example: IMEI000099999999999. |
| What is the APN? | Access Point Name of SIM card. Check with your SIM card provider or apn.how. |
| How to set APN? | Send SMS command: 803+password+blank+APN. If APN needs user/pass: 803+password+blank+APN+blank+APNuser+blank+APNpass. |
| How to get Group user for Multiple devices? | Contact SinoTrack support to create a group account. |
| Device supports 3G or 4G SIM card? | Yes, it supports 2G+4G network. Ensure your SIM card provides 2G+4G. |
| How much internet data is used per month? | Approximately 50-100MB per month. |

Detailed FAQ and troubleshooting guide
6.1. Other Functions (SMS Commands)
- RESTART: Send
RESTART+passwordto restart the tracker. - RCONF: Send
RCONF+passwordto read the current configuration of the tracker. The reply will detail settings like ID, password, control numbers, working mode (GPRS/SMS), daily report, geo-fence, over speed, voice, shake alarm, sleep mode, APN, IP, Port, GPRS upload time, and time zone.
7. User Tips
- Power Input: While the device specifies 12V, some users have inquired about a wider operational power range (e.g., 9-100V). Always adhere to the manufacturer's specified voltage (12V) to prevent damage.
- SIM Card Choice: The product does not include a SIM card. Choose a SIM card that supports 2G and 4G networks and has a suitable data plan for continuous tracking.
- Group Account: If you manage multiple SinoTrack GPS trackers, contact SinoTrack support to set up a free group account. This allows you to monitor all your devices simultaneously on one platform.
8. Warranty and Support
8.1. Warranty Information
The product is tested strictly before shipping and packaged carefully. If the product is damaged during transit, please contact customer support before opening any dispute or leaving negative feedback. SinoTrack is committed to resolving any issues.
8.2. Customer Support
For any questions regarding usage, installation, or configuration of your tracker, please feel free to contact SinoTrack customer support. They aim to reply to all inquiries within 24 hours.
You can also refer to the official user manual PDF for more detailed information: SinoTrack ST-901AL User Manual (PDF)

