1. Introduction
The ZTE MF626 is a 3G USB modem designed to provide wireless internet access for your personal computer. This manual provides essential information for the proper setup, operation, and maintenance of your device, ensuring optimal performance and longevity.
2. Safety Information
- Do not expose the modem to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the modem to severe impact.
- Keep the modem away from water and other liquids.
- Do not attempt to disassemble or modify the modem. This will void the warranty.
- Use only approved accessories.
3. Product Overview
The ZTE MF626 is a compact USB modem. It features a USB connector for connecting to your computer, a SIM card slot, and an indicator light to show its operational status.

Image 1: ZTE MF626 3G USB Modem. This image displays the compact design of the modem, typically showing the USB connector and the main body of the device.
4. Setup
4.1 System Requirements
- Operating System: Windows XP/Vista/7/8/10 or macOS (specific versions may vary).
- USB 2.0 port or higher.
- Minimum 100MB free hard disk space.
- Minimum 256MB RAM.
4.2 SIM Card Installation
- Locate the SIM card slot on the modem. This is usually covered by a small cap or located on the side.
- Gently slide open the SIM card slot cover.
- Insert your activated 3G SIM card into the slot with the gold contacts facing down and the cut corner oriented correctly, as indicated by the diagram on the modem.
- Close the SIM card slot cover securely.
4.3 Connecting the Modem
Plug the ZTE MF626 modem directly into an available USB port on your computer. Ensure it is firmly seated.
4.4 Driver Installation
Upon first connection, your computer should automatically detect the modem and initiate the driver installation process. Follow the on-screen prompts. If the installation does not start automatically, navigate to 'My Computer' or 'This PC', locate the modem's virtual CD-ROM drive, and run the setup executable (e.g., 'AutoRun.exe').
5. Operating the Modem
5.1 Connecting to the Internet
- After successful driver installation, the modem's connection software should launch automatically. If not, open it from your desktop shortcut or the Start Menu.
- The software interface will display network status. Wait for the modem to register with the network (the indicator light will typically change from blinking to solid blue or green).
- Click the 'Connect' button within the software. The modem will establish a 3G internet connection.
- You can now browse the internet.
5.2 Disconnecting from the Internet
To disconnect, open the modem's connection software and click the 'Disconnect' button. Safely remove the modem from your computer after disconnecting.
5.3 Software Interface
The connection software provides features such as connection status, data usage monitoring, SMS messaging, and network settings. Refer to the software's built-in help for detailed information on these functions.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the modem. Do not use liquid cleaners or aerosols.
- Storage: When not in use, store the modem in a cool, dry place, away from dust and direct sunlight.
- Software Updates: Periodically check the manufacturer's website for any available software or firmware updates for your modem.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Modem not detected by computer. | Loose connection, faulty USB port, driver issue. | Ensure modem is firmly plugged in. Try a different USB port. Reinstall drivers. |
| Cannot connect to the internet. | No network signal, inactive SIM card, incorrect APN settings. | Check signal strength in software. Ensure SIM card is active and has credit/data. Verify APN settings with your service provider. |
| Slow internet speed. | Weak signal, network congestion, data cap reached. | Move to an area with better signal. Check data usage. Contact service provider. |
| Indicator light not on. | No power, modem not properly inserted. | Ensure modem is fully inserted into the USB port. Try another USB port. |
8. Specifications
- Brand: ZTE
- Model: MF626
- Type of Modem: Cellular Modem
- Compatible Devices: Personal Computer
- Number of Ports: 1 (USB)
- ASIN: B019990KUM
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your retailer or the official ZTE support channels. Keep your proof of purchase for warranty claims.