1. Product Overview
The ZTE MF833U1 is a high-speed 4G LTE USB modem designed to provide reliable mobile broadband connectivity. It supports CAT4 speeds, offering download rates of up to 150Mbps and upload rates of up to 50Mbps. This device allows you to connect to the internet via a cellular network by simply plugging it into a compatible USB port on your computer or other device.


2. Setup Guide
Follow these steps to set up your ZTE MF833U1 USB Modem:
- Insert SIM Card: Carefully remove the back cover of the modem. Locate the SIM card slot and insert your activated 4G LTE SIM card into the slot. Ensure the SIM card is correctly oriented according to the diagram on the device.

Figure 3: ZTE MF833U1 with back cover removed, illustrating the SIM card insertion area. - Replace Cover: Once the SIM card is securely in place, reattach the back cover.
- Connect to Computer: Remove the USB protective cap. Plug the ZTE MF833U1 modem into an available USB 2.0 port on your computer.

Figure 4: ZTE MF833U1 with USB cap removed, exposing the USB connector. - Driver Installation (First Use): For the first time connecting the modem to a computer, the necessary drivers may install automatically. If not, the modem typically acts as a virtual CD-ROM drive containing the installation software. Navigate to "My Computer" or "This PC", open the modem's drive, and run the setup executable. Follow the on-screen instructions to complete the driver and connection manager software installation.
- Connect to Network: After successful driver installation, open the connection manager software. Select your preferred network profile or create a new one if required (e.g., APN settings). Click "Connect" to establish a mobile broadband connection.
3. Operating Instructions
The ZTE MF833U1 is designed for straightforward operation:
- Automatic Connection: In many cases, once the drivers are installed, simply plugging the modem into a USB port will initiate the connection manager and attempt to connect to the internet automatically.
- Manual Connection/Disconnection: Use the installed connection manager software to manually connect or disconnect from the mobile network. This software also provides information on signal strength, data usage, and network status.
- Indicator Light: The modem features an indicator light that provides status information (e.g., solid blue for 4G connected, blinking green for searching for network). Refer to the connection manager software for detailed light status explanations.
- Operating System Compatibility: The modem is compatible with a wide range of operating systems, including Windows 7, Windows 8, Windows 10, Windows XP, Windows VISTA, MAC OS, and LINUX.
- Note on Wi-Fi: This device is a USB modem for direct computer connection and does not provide Wi-Fi hotspot functionality.
4. Maintenance
To ensure the longevity and optimal performance of your ZTE MF833U1 modem, follow these maintenance guidelines:
- Keep Dry: Avoid exposing the modem to moisture, humidity, or liquids.
- Clean Gently: Use a soft, dry cloth to clean the exterior of the modem. Do not use harsh chemicals or abrasive cleaners.
- Avoid Extreme Temperatures: Do not expose the modem to very high or very low temperatures.
- Protect USB Connector: Always use the protective cap when the modem is not in use to prevent dust and damage to the USB connector.
- Software Updates: Periodically check the ZTE support website for any available firmware or software updates for your modem to ensure optimal performance and security.
5. Troubleshooting
If you encounter issues with your ZTE MF833U1 modem, try the following troubleshooting steps:
- Modem Not Recognized by Computer:
- Ensure the modem is fully inserted into the USB port.
- Try a different USB port.
- Restart your computer.
- Verify that drivers are correctly installed. If not, reinstall them from the modem's virtual CD-ROM drive or ZTE's support website.
- No Network Signal or Slow Speed:
- Check if your SIM card is active and has a valid data plan.
- Ensure the SIM card is correctly inserted.
- Move to an area with better cellular coverage.
- Verify that your network provider supports the frequency bands of the MF833U1 in your region (refer to the Specifications section).
- Check the connection manager software for signal strength and network status.
- Restart the modem by unplugging and re-plugging it.
- Cannot Connect to the Internet:
- Confirm that your APN (Access Point Name) settings in the connection manager software are correct for your mobile network operator.
- Ensure you have sufficient data balance on your SIM card.
- Try connecting manually through the connection manager software.
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | ZTE MF833U1 |
| Brand Name | ZTE |
| Max. LAN Data Rate | 150Mbps (CAT4) |
| Type | Wireless (Cellular Modem) |
| Wi-Fi Functionality | No (Direct USB connection only) |
| Network Mode | LTE-FDD / LTE-TDD / WCDMA / GSM |
| Frequency Bands (FDD-LTE) | B1 (2100MHz), B3 (1800MHz), B5 (850MHz), B8 (900MHz), B7 (2600MHz), B28 (700MHz), B2 (1900MHz), B20 (800MHz) |
| Frequency Bands (TDD-LTE) | B40 (2300MHz), B38 (2600MHz), B39 (1900MHz), B41 (2500MHz) |
| Frequency Bands (WCDMA) | B1 (2100MHz), B8 (900MHz), B5 (850MHz) |
| Frequency Bands (GSM) | B2 (1900MHz), B3 (1800MHz), B5 (850MHz), B8 (900MHz) |
| Interface | USB2.0 |
| Speed (DL/UL) | 150Mbps / 50Mbps (CAT4) |
| System Platform | Cortex-R7 |
| Operating System Compatibility | Windows 7 / 8 / 10 / XP / VISTA, MAC OS, LINUX |
| Product Dimensions (L x W x H) | 93.8 x 28.6 x 13.5 mm |
| Package Weight | 0.11 KG |
| Package Contents | 1 x USB Modem, 1 x User Manual |
| Certification | CE |
| Origin | Mainland China |
7. User Tips
- Check Frequency Band Compatibility: Before purchasing or using, always verify that the modem's supported frequency bands (listed in the Specifications section) are compatible with your local mobile network operator. A useful resource for checking country-specific frequency bands is www.frequencycheck.com/countries.
- APN Settings: If you experience connection issues, double-check your Access Point Name (APN) settings. These are specific to your mobile carrier and are crucial for establishing a data connection. Your carrier's support website or customer service can provide the correct APN.
- Signal Strength: For optimal performance, use the modem in locations with good cellular signal strength. The connection manager software usually displays the current signal level.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the seller/manufacturer directly. Keep your proof of purchase for warranty claims.





