1. Introduction
This manual provides comprehensive instructions for the Annadue 4G LTE USB WiFi Modem. Please read this manual carefully before using the device to ensure proper operation and to maximize its performance. This portable WiFi hotspot allows you to connect multiple devices to the internet using a SIM card.
2. Product Overview
The Annadue 4G LTE USB WiFi Modem is a compact and lightweight device designed for portable internet access. It supports LTE CAT4 standard, offering high-speed internet connectivity. The device features a SIM card slot and an internal battery for on-the-go use.

Figure 2.1: Front view of the Annadue 4G LTE USB WiFi Modem, showing indicator lights for signal, WiFi, and battery, along with the 4G/5G logo and power button.

Figure 2.2: The compact and lightweight design of the modem, suitable for various portable uses.

Figure 2.3: The modem features a SIM card slot and is powered by a 3200 mAh internal battery.
3. Setup
Follow these steps to set up your Annadue 4G LTE USB WiFi Modem:
- Insert SIM Card: Open the back cover of the device and carefully insert your 3G/4G SIM card into the designated slot. Ensure the SIM card is correctly oriented.
- Install Battery: Place the 3200 mAh battery into its compartment and close the back cover securely.
- Power On: Press and hold the power button (usually located on the front or side) until the indicator lights illuminate.
- Disable SIM PIN (if necessary): If your SIM card has a PIN code enabled, you may need to disable it using a mobile phone before inserting it into the modem. The modem may not be plug-and-play if a PIN is active.
- Modify APN Settings (if necessary): Depending on your network provider, you might need to manually configure the Access Point Name (APN) settings. This is typically done through the device's web interface. Refer to your network provider for the correct APN settings.

Figure 3.1: Illustration of inserting a SIM card into the modem.

Figure 3.2: Close-up of the modem's power button and USB charging port.

Figure 3.3: Visual guide for SIM card insertion and the importance of disabling PIN and modifying APN settings for proper functionality.
4. Operating Instructions
Once the modem is set up and powered on, you can connect your devices:
- Connect to WiFi: On your smartphone, tablet, or laptop, search for available WiFi networks. The modem's WiFi network name (SSID) and password are usually printed on a label inside the battery compartment or on the device itself.
- Enter Password: Select the modem's SSID and enter the WiFi password when prompted.
- Internet Access: Your device should now be connected to the internet. The modem supports connecting up to 10 devices simultaneously, with an effective WiFi distance of up to 10 meters.
- Charging: Connect the modem to a USB power source (e.g., computer USB port, car USB charger, power adapter) using the provided USB cable to charge the internal battery. The device can operate while charging.

Figure 4.1: The modem can connect up to 10 devices simultaneously, including smartphones, tablets, and laptops.
5. Maintenance
- Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to extreme temperatures, direct sunlight, or moisture.
- Do not attempt to disassemble or repair the device yourself. Refer to qualified service personnel.
- For optimal battery life, avoid fully discharging the battery frequently and store the device in a cool, dry place if not used for extended periods.
6. Troubleshooting
If you encounter issues with your Annadue 4G LTE USB WiFi Modem, refer to the following common problems and solutions:
- No Internet Connection:
- Ensure the SIM card is correctly inserted and active.
- Verify that the SIM card's PIN code is disabled.
- Check and configure the APN settings according to your network provider's specifications.
- Confirm that you have an active data plan on your SIM card.
- Check the signal strength indicator on the modem. Move to an area with better network coverage if the signal is weak.
- Device Not Powering On:
- Ensure the battery is properly installed and charged.
- Connect the device to a power source using the USB cable and try powering it on again.
- Unable to Connect to WiFi:
- Verify that the modem is powered on and its WiFi indicator light is active.
- Double-check the WiFi network name (SSID) and password.
- Ensure your device is within the 10-meter effective WiFi range.
- Restart both the modem and your connecting device.
- Slow Internet Speed:
- Internet speed depends on signal strength. Move to an area with better reception.
- Ensure no other applications or devices are consuming excessive bandwidth.
- Check your data plan for any speed limitations or data caps.
7. Specifications
The following table details the technical specifications of the Annadue 4G LTE USB WiFi Modem:

Figure 7.1: Dimensions of the Annadue 4G LTE USB WiFi Modem.
| Feature | Detail |
|---|---|
| Brand | Annadue |
| Model Number | Annadue48x6d09myk |
| Color | White |
| Connectivity Technology | USB, Wi-Fi |
| Wireless Communication Standard | 802.11ac |
| Frequency Band Class | Dual band |
| Operating System | Linux |
| Compatible Devices | Smartphones, tablets, laptops |
| Antenna Type | Internal |
| Max Speed | 300 Mbps (LTE CAT4) |
| Supported Network Bands | B1/2/3/5/7/8/20/40 |
| Battery Capacity | 3200 mAh |
| Max Connected Devices | 10 |
| Effective WiFi Distance | Up to 10 meters |
| Recommended Uses | Parties, travel, business trips, work, outdoor live streaming, gaming, car WiFi |
8. Warranty and Support
The Annadue 4G LTE USB WiFi Modem comes with a 1 Year Warranty Against Manufacturer Defects. For warranty claims or technical support, please contact your retailer or the manufacturer directly. Keep your proof of purchase for warranty validation.