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UF21 Wi-Fi USB Dongle
UF21 Portable Wi-Fi Dongle
UF21 UFi Dongle
UF21 4G LTE Dongle
UF21 Wi-Fi USB Dongle
UF21 Portable Wi-Fi Dongle
UF21 UFi Dongle
UF21 4G LTE Dongle

UF21 4G LTE UFi Dongle

  • 4G Cat.4 UFi Dongle
  • 2.4GHz Wi-Fi 150Mbps 4G LTE Dongle
  • LTE 1T2R, DL MIMO 2*2
  • Up to 8 Concurrent Devices
  • Global Frequency Band Customization
  • Size 96mm (H) x 34mm (W) x 12mm (D)

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UF21 4G LTE UFi Dongle



  • USB Plug-in and Networking
  • LTE Cat.4 700MHz~2700MHz Band Optional
  • 2.4GHZ 150M Wi-Fi 1T1R Max 8 Users Online
  • Cellular Band and UI Customization
  • Diversified Configuration to Match Needs and Cost
  • eSIM optional
  • 5V/1A Power Supply
  • Support Windows XP/7/8/10, Linux, Android
  • IPV4/IPV6, Firewall, NAT
  • FOTA and Management Services


  • UF21 4G LTE UFi dongle is a brand new pocket-size UFi dongle that can tap into a 4G or 5G cellular network to achieve a Cat 4 high-speed wireless broadband hotspot.


  • Designed with a universal USB port to be externally powered through a computer/laptop/power bank/car charger, the UFi dongle is plug and play, portable and affordable, easy to carry, and convenient to use. Wireless devices including mobile phones, laptops, tablets, and other smart devices, can access the device simultaneously.


  • UF21 4G LTE UFi dongle can be shared with up to 8 concurrent devices and no need for additional software installation. The UF21 4G LTE UFi dongle can be applicable in a variety of scenarios that require the temporary or fast deployment of wireless networks through a standard USB port: such as travel, on the go, office meetings, hotels, shops, and cars.


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Frequency Bands

China & Southeast Asia Europe & Africa Asia Pacific Middle East America

LTE: B1/3/5/8/38/40/41







We welcome worldwide wireless communication/telecom operators or IoT project contractors to inquire more on UF21 4G LTE UFi dongle about global frequency band customization, customized UI / Application / Function / Appearance service, etc.



Mobile Work

UFi Dongle for Mobile Work

Travel & Holiday

UFi Dongle for Travel Holiday

Store Networking

UFi Dongle for Store Networking



As long as there is a power supply for the 4G LTE UFi dongle, there is a 4G-to-WIFI network.

UF21 4G LTE UFi Dongle

UF21 4G LTE UFi Dongle

Basic Parameters

Size (mm)

98 (H) x 28 (W) x 10 (D)

Working temperature


Power Supply

Input 5V-18V (USB)

Storage temperature

-25℃ to 70℃



USB 2.0

4G Antenna

1T2R Interal

WiFi Antenna

1T1R Internal




Nano 3FF SIM *1
eSIM *1 (5mm*6mm)


Blue: LTE status

Green: WIFI status

Red: Work status

Network Configuration

LTE Peak Rate

FDD-LTE: Up to 150Mbps(DL), 50Mbps(UL)
TDD-LTE: Up to 112Mbps(DL), 12Mbps(UL)
WCDMA: Up to 21Mbps(DL), 5.76Mbps(UL)

Transmit power

WCDMA: 24dBm+1dB/-3dB;

WiFi 4

Peak Rate: 802.11n:150Mbps

2.4GHz, Up to 8 users online


IEEE 802.11b/g/n

Q: Are UFi Dongle Better Than Broadband
A: It depends on the specific application scenarios. For traveling or moving a lot, the UFi dongle is an ideal companion that is portable, detached, and transportable, allowing the network availability of a UFi dongle superior mobility.
Q: Are UFi Dongle Wireless
A: Yes! And wireless portability is one of the UFi dongle's main advantages compared to home fixed broadband. The UFi dongle can be linked to the network without cable, making it easier to access the web.
Q: Are UFi Dongles Universal
A: Regarding the power supply, UFi dongles are universal with a USB port power supply. However, the embedded frequency band supports are different. So make sure the band configuration works with local telecoms provision.
Q: Can UFi Dongle Be Connected To Mobile
A: ThinkWill is investigating a type of UFi dongle with a USB-C (also known as USB Type-C) port configuration. This UFi dongle intends to directly plug into the mobile phone with a Type-C port to provide a cellular network connection. Inquire more if any interest.


The product pictures and screen content on the above pages are for illustration only. The actual product effects (including but not limited to appearance, color, size) and screen display content (including but not limited to background, UI, and graphics) may be slightly different, please subject to the actual product.

The data on the above page are theoretical values, all from ThinkWill's internal laboratory, obtained under a specific test environment (please see each specific description), actual use may be due to individual product differences, software versions, use conditions and environmental factors The difference is slightly different, please refer to the actual use.

Due to the real-time changes in product batches and production supply factors, in order to provide as accurate product information, specification parameters, and product features as possible, ThinkWill may adjust and revise the text descriptions, picture effects and other content on the above pages in real time to match the actual products. Performance, specifications, indexes, parts and other information are matched.

In the event that the above-mentioned modifications and adjustments are indeed necessary, no special notice will be given.

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Shenzhen ThinkWill Communication Technology Co., Ltd.

+86 755-21601999
+86 177 2249 5914
13th Floor, Yishang 3D Industrial Park, No.642-2 Zhoushi Road, Hangcheng Street, Baoan District, Shenzhen, China


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