1. Introduction
This manual provides essential information for the safe and efficient use of your 4G WiFi Router Portable LTE USB Modem. Please read it thoroughly before operating the device and retain it for future reference.
The ALLOYSEED U6-W is a versatile device that functions as both a 4G USB modem and a portable USB Wi-Fi router. It offers high-speed internet access, supporting 3G, 4G, and Wi-Fi networks, making it ideal for various environments including office and home use. Its compact design allows for easy portability and connectivity for multiple devices such as laptops, notebooks, UMPCs, and MID devices.
2. Important Safety Instructions
For your protection, read and understand all instructions before use. Keep this manual for future reference.
- Use: For household use only. Use only as described in this manual.
- Condition: Do not use if the product is damaged in any way.
- User: Intended for persons aged 18 and above. Persons with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, may use only under close supervision and if they understand the hazards involved.
- Always prioritize safety. Contact the manufacturer with any questions.
3. Package Contents
Please check the package for the following items:
- 1 x 4G WiFi Router (U6-W)
- 1 x External Antenna
- 1 x Instruction Manual
4. Product Overview
The ALLOYSEED U6-W is designed for portable and reliable internet connectivity. It features a compact form factor and supports various power sources.

Figure 4.1: Front view of the 4G LTE USB WiFi Modem with antenna and Nano SIM card slot indicated.

Figure 4.2: Portable WiFi modem shown with laptop, tablet, and smartphone, illustrating its use as a portable hotspot.

Figure 4.3: Diagram highlighting Fast & Stable High-speed Internet Access with 4G Download rate (150 Mbps), 4G Upload rate (50 Mbps), and WiFi transmission rate (150 Mbps).

Figure 4.4: Plug & play diagram showing the USB modem being powered by a USB adapter, power bank, and car charger.

Figure 4.5: Product dimensions: 90mm/3.54in length, 29mm/1.14in width, 13.5mm/0.53in height.

Figure 4.6: Close-up view of the external antenna interface on the modem.
5. Setup Instructions
Follow these steps to set up your 4G WiFi Router:
- Unboxing: Carefully remove the router and accessories from the packaging.
- Insert SIM Card: Push the rear cover down to open the SIM card slot. Insert a Nano SIM card with the card core facing downwards into the designated slot.
- Connect External Antenna (Optional): If better signal reception is desired, connect the provided external antenna to the antenna interface on the modem.
- Power On: Insert the USB port of the modem into a power supply (e.g., USB adapter, power bank, car charger) to obtain WiFi. The indicator light will illuminate.
Video 5.1: Unboxing, SIM card insertion, and powering the 4G WiFi Modem.
6. Operating Instructions
Once the device is powered on and the SIM card is inserted, you can begin using your portable WiFi hotspot:
- Connect to WiFi: On your device (laptop, smartphone, tablet), search for available Wi-Fi networks. The network name (SSID) and password can typically be found on a sticker on the modem itself or in the user manual. Connect to the network.
- Access Internet: Once connected to the Wi-Fi network, you can go online and access the internet.
- Access Router Settings: To modify Wi-Fi settings (name, password, APN), open a web browser on a connected device and enter the IP address
192.168.0.1into the address bar. This will take you to the router's administration page. The default username and password are often 'admin' (check the device sticker or manual for exact credentials).
7. Specifications
| Feature | Specification |
|---|---|
| Model | U6-W |
| Color | White |
| Material | Plastic |
| Transmission Rate | 150Mbps |
| 4G LTE FDD Bands | Band 1/3/7/8/20 (2100/1800/2600/900/800MHz) |
| 4G LTE TDD Bands | Band 38/40/41 (2600/2300/2500MHz) |
| 3G WCDMA/UMTS Bands | Band 1/8 (2100/900MHz) |
| CPU Chip Model | ASR1803S |
| WiFi/Bluetooth Chip Model | ASR5803W (2.4 GHz and 75 Mbps PHY) |
| SIM Card Slot | Nano SIM |
| Device Memory | Flash: 128M NOR |
| USB Interface | 1 USB 2.0 male port |
| Wireless Transmission Power | TDD-LTE: 23dbm ± 2dbm, FDD-LTE: 23dbm ± 2dbm, WCDMA: 23dbm ± 2dbm |
| LTE (DL/UL) | TDD-LTE: Cat4 130 Mbps DL/35Mbps UL, FDD-LTE Cat4 150 Mbps DL/50Mbps UL |
| WCDMA (DL/UL) | DL 21Mbp / UL 5.76Mbps |
| 3GPP/3GPP2 Protocol | LTE FDD/TDD Rel 9 |
| WiFi Standard | 802.11 b/g/n (1 * 1 only) |
| Max. WiFi Connected Users | 8 |
| Indicator Light | Supported |
| Working Temperature | -10~60 °C |
| Storage Temperature | -45~85 °C |
| Humidity | 10%~95% |
| Product Size | 90 * 29 * 13.5mm (3.54 * 1.14 * 0.53in) |
| Gross Weight | 50g |
| Application | Mini Wifi |
| Standards And Protocols | Wi-Fi 802.11g |
| Wireless transmission rate | 300m |
| Support Mesh | Not Supported |
| Frequency | 2.4 GHz |
| Antenna Type | Fixed |
| Recommended Uses | Business |
| Wireless Communication Standard | 802.11.ac |
| Frequency Band Class | Dual-Band |
| Max. LAN Data Rate | 150Mbps |
| With Modem Function | No |
| Type | WireLess |
| Origin | Mainland China |
| Certification | None |
8. Troubleshooting
If you encounter issues with your 4G WiFi Router, consider the following:
- No Internet Connection:
- Ensure the SIM card is correctly inserted and activated with a data plan.
- Check the indicator light on the modem; if it's not lit or is red, there might be a power or SIM card issue.
- Verify that your device is connected to the correct Wi-Fi network (SSID).
- Access the router's administration page (
192.168.0.1) to check the connection status and APN settings. Ensure the APN settings match your mobile carrier's requirements. - Try restarting the modem by unplugging and re-plugging it from the power source.
- Slow Internet Speed:
- Ensure you are within a good signal coverage area for your 4G network.
- Try connecting the external antenna if not already in use.
- Reduce the number of connected devices, as the modem supports a maximum of 8 users.
- Check for any data caps or throttling from your mobile carrier.
- Cannot Access Router Settings Page:
- Ensure your device is connected to the modem's Wi-Fi network.
- Double-check the IP address (
192.168.0.1) for typos. - Try a different web browser or clear your browser's cache.
9. User Tips
- Check Frequency Bands: Before purchasing or using the device in a new location, it is highly recommended to verify that the modem's supported frequency bands match those used by local mobile operators. You can use online resources like
https://www.frequencycheck.com/countries,https://www.gsmarena.com/network-bands.php3, orhttp://en.wikipedia.org/wiki/List_of_LTE_networksto check compatibility. - Secure Your Network: Always change the default Wi-Fi name (SSID) and password to a strong, unique combination to protect your network from unauthorized access.
- Portable Power: Utilize a power bank for extended portable use, ensuring you have internet access on the go without needing a wall outlet.
10. Warranty and Support
For detailed warranty information and customer support, please refer to the official user manual PDF provided by the manufacturer. This document contains comprehensive details regarding product guarantees, service procedures, and contact information.
A digital version of the user manual is available at: User Manual (PDF)
11. Compliance Information
Product Name: Consumer Electronics
Manufacturer: Guangzhou Aicai Technology Co., Ltd.
Address: Room 709, No. 68, Gangwan Road, Huangpu District, Guangzhou
This product complies with the following directives and regulations:
- CE: Conforms with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA).
- FC: Complies with the Federal Communications Commission standards.
- RoHS: Complies with the Restriction of Hazardous Substances Directive.
Made In China

Figure 11.1: Compliance logos and recycling information.





