The firmware may have wiped your IMEI data. Use an IMEI repair tool to write the original IMEI number found on the physical sticker of your dongle back onto the device. Where to Find Free Firmware Safely
The most reliable place to look for this information is on the device's printed circuit board (PCB). se a small screwdriver to open the plastic casing of your dongle and look for the silk screen printing on the board. Key identifiers to look for include:
This article is for educational purposes only. Downloading and flashing firmware may void your warranty or brick (permanently damage) your device. Always ensure you have a legal backup and own the original license for the software.
Check under the SIM cover for a model number like MS2131 , E8372 , or UFI-XXX . 4g Ufi Dongle Firmware -FREE-
📡 4G UFi Dongle Firmware – FREE Download & Flashing Guide
Websites like firmwarefile.com or gsmmob firmware often have a "Ufi Dongle" section. Filter by "Price: Free." Avoid sites asking for "points" or "premium membership."
Search for Ufi_ALL_Models_PAC_Archive . This collection has over 2,000 .pac files for Spreadtrum/Unisoc chips. Look for files named Ufi_M030_Spre_TRUNK_4G_V2.3_FREE.pac . The firmware may have wiped your IMEI data
Before starting, or connected to a constant power source. Do not turn off your computer during the update. Method 1: Web Interface Update (OTA - Over The Air) Connect your computer to the dongle's Wi-Fi.
: It functions as both a 4G USB modem and a standalone Wi-Fi router when plugged into a power source (like a power bank). It typically supports download speeds up to 150 Mbps and upload speeds up to 50 Mbps.
Click the start or download button in the software interface. The progress bar will turn green or show a success message when finished. Unplug the dongle and restart it. Troubleshooting Common Errors Device Not Recognized se a small screwdriver to open the plastic
If your dongle is branded by a specific company, use their official support pages:
To flash new firmware, you generally need to put the device into or Fastboot mode: OpenWrt UZ801 LTE USB MODEM with Wi-Fi HotSpot - Qiita
A 4G UFi dongle is a portable mobile broadband device (MiFi-style) that provides internet access by creating a local Wi‑Fi network using a cellular (4G/LTE) SIM. Firmware is the device’s embedded software that controls modem functions, Wi‑Fi/AP behavior, security, USB/network interfaces, and any web management UI. Custom or updated firmware can add features, fix bugs, patch security issues, or enable unlocked/operator-agnostic use — but flashing firmware carries risk (bricking, warranty voiding, legal/regulatory limits).
If the power goes out or the USB cable is disconnected during a firmware flash, your dongle might become inoperable.
So, when thousands of users search for a "free" version, what are they actually getting? Let’s break down the reality.