1. Introduction
This manual provides detailed instructions for the operation and maintenance of your TK905B 4G LTE GPS Tracker. Please read this manual carefully before using the device to ensure proper setup and functionality. The TK905B is a 4G GPS Tracker designed for locating and monitoring targets remotely using the 4G LTE network and GPS satellites. It utilizes advanced GPS, LBS, and Wi-Fi positioning technologies. Featuring a built-in powerful magnet, it can be easily and securely installed on cars, trucks, and other assets with metal surfaces.
2. Setup Guide
2.1. Package Contents
Upon opening the package, you should find the following items:
- TK905B GPS Tracker Unit
- USB Charging Cable
- SIM Card Adapter Kit (Normal, Micro, Nano)
- User Manual
- Carrying Pouch
2.2. SIM Card Installation
The TK905B GPS Tracker requires a 4G-enabled SIM card with an active data plan for full functionality. Ensure the SIM card has sufficient balance and that any call forwarding features are disabled.
- Locate the rubber cover on the side of the device.
- Carefully open the rubber cover to reveal the SIM card slot.
- Insert the SIM card (with the chip facing upwards) into the slot until it clicks into place.
- Close the rubber cover securely to maintain the device's waterproof rating.

Image: Close-up of the SIM card slot on the TK905B GPS Tracker.

Image: Illustration of Normal, Micro, and Nano SIM card types. Use the provided adapter if necessary.
2.3. Powering On and Indicator Lights
Once the SIM card is installed, the device will power on automatically. Observe the indicator lights for status:
- Yellow Light - Solid: No GPRS signal.
- Yellow Light - Flash: GPRS connection established.
- Blue Light - Solid: No GPS signal.
- Blue Light - Flash: GPS connection established.
2.4. APN Settings
For some mobile SIM cards, you may need to manually configure the APN (Access Point Name) settings. This is typically done by sending SMS commands to the tracker's phone number. Consult your SIM card provider for the correct APN details.
Example SMS Commands for APN Setup:
- Set APN:
apn123456 [your_APN_name](e.g.,apn123456 web.vodafone.de) - Set APN Username:
apnuser123456 [your_APN_username](e.g.,apnuser123456 vodafone) - Set APN Password:
apnpasswd123456 [your_APN_password](e.g.,apnpasswd123456 vodafone)
The tracker should reply with
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