Once you have unlocked the firmware, you can customize the modem further:
This is the most critical step. Do not download random .bin files from untrusted forums without verifying checksums.
We will use the most reliable tool: Huawei Balong Download Tool v1.2.
The Huawei E8372h-320 (often labeled as the "Huawei 4G LTE Stick" or "Mobile WiFi") is one of the most popular USB modems on the market. It is revered for its versatility: it functions as a standard USB dongle for a laptop or as a portable hotspot when plugged into a battery pack or wall adapter.
However, there is a major frustration that plagues many users: carrier locking. If you bought your E8372h-320 from a specific network provider (like T-Mobile, Vodafone, AT&T, or any local ISP), it is likely "SIM-locked." This means you cannot use a different carrier’s SIM card without an unlock code.
Enter unlock firmware. This guide will walk you through everything you need to know about the e8372h320 unlock firmware install process—from understanding the risks to executing the flash like a pro.
Last updated: October 2025. Firmware versions and tools may change; always verify checksums.
Have you successfully performed the unlock? Share your experience in the comments below!
Unlocking the Huawei E8372h-320 (Zong or generic versions) is more complex than older "h-153" models because it belongs to the Huawei 4+ platform, which features encrypted firmware and a locked bootloader. Important Prerequisites
A Windows PC: You will need specialized drivers and flash tools that are rarely stable on macOS or Linux. e8372h320 unlock firmware install
Male-to-Male USB Cable: Necessary if you need to use "Test Point" mode (short-circuiting internal pins) to force the device into a flashable state.
Firmware Files: You must source a "downgrade" or "unlocked" firmware (often versions like 10.0.1.1 or specific modified builds). Installation Steps 1. Preparation & Drivers
Install the Huawei DataCard Driver and the FC Serial Driver. Without these, your PC won't recognize the modem's internal COM ports even if it's plugged in. 2. Entering Bootloader Mode (Test Point) Go to product viewer dialog for this item.
usually has a locked serial interface, you often have to disassemble the casing. Locate the Test Point pins on the PCB.
Short the specific point to the ground (the metal USB casing) while plugging it into the PC.
If successful, your Device Manager will show a new entry under Ports: Huawei Mobile Connect - DownLoad Port. 3. Flashing the Unlocked Firmware
Load the Tool: Use a flashing utility like Huawei Flash Tool or Balong USB Downloader. Select Firmware
: Load the .bin or .exe firmware file specifically designed for the
Flash: Hit start. Do not disconnect the device during this process, as it will "brick" the modem (make it permanently unusable). 4. Writing the NV Items (Optional/Advanced) Once you have unlocked the firmware, you can
Sometimes, after flashing, the IMEI or serial number is wiped. You may need to use DC-Unlocker or Huawei Calculator tools to re-enter commands like: AT^NVWREX=0,44,16, ... (to repair network settings) AT^RESET (to reboot the device) 5. Finalizing Once the flash is complete: Unplug the device and reassemble. Plug it back in and access the WebUI (usually 192.168.8.1).
Check if the "Network Settings" now allow you to change APNs for any carrier. ⚠️ Critical Warnings
Version Check: If your current firmware version is very recent (e.g., late 2023/2024 builds), Huawei may have patched the "Test Point" exploit, making it currently impossible to unlock without paid credits from services like DC-Unlocker.
Risk: This process carries a high risk of "bricking" the hardware. Proceed only if you are comfortable with hardware disassembly.
Unlocking the Huawei E8372h-320 Wingle allows you to use SIM cards from any network provider. Unlike older models, the -320 version features updated security, making the firmware installation process more specific. Prerequisites and Tools Before starting, ensure you have the following: USB Driver: Install the Huawei Mobile Partner
or specialized "Huawei USB Drivers" so your PC recognizes the device in "Download Mode."
Firmware File: You need a modified (modded) firmware specific to the E8372h-320
. Note: Using firmware for the -153 or -608 variants will brick your device.
Balong USB Downloader: A tool used to force the firmware onto the device if it's not detected via standard COM ports. Last updated: October 2025
DC-Unlocker or PuTTY: To send AT commands for final configuration. Step-by-Step Installation Guide 1. Enter Force Download ModeSince most E8372h-320
units come with "locked" bootloaders, you often need to perform a "test point" (short-circuiting two specific pins on the motherboard) while plugging it into the USB port. This forces the device into a mode where it can accept new firmware.
2. Install the DriversOnce plugged in, check your Device Manager. You should see "Huawei Mobile Connect - Downloader Port." If you see an "Unknown Device," manually update the driver using the Huawei USB driver folder. 3. Flash the Modded Firmware
Open the firmware flashing tool (usually sw_update.exe included with the modded firmware package). Select the correct COM port identified in Device Manager. Click Start. The LED lights on the
will blink rapidly during the process. Do not unplug the device until the software shows a "Success" message.
4. Apply the WebUI (Optional but Recommended)Modded firmware often comes with a separate WebUI file. This provides a custom dashboard that allows you to see signal strength (RSSI), change TTL (to bypass hotspot limits), and manage SMS. Install this immediately after the firmware flash.
5. Final Unlock via AT CommandsOpen PuTTY or DC-Unlocker, select the "Application Port," and enter the following commands to ensure the modem is globally unlocked: AT^NVWREX=8268,0,1,1,0,0,0,0,0,0 (Resets the lock status) AT^RESET (Reboots the device) Important Warnings
IMEI Integrity: Some firmware flashes can wipe your IMEI. Always back up your NVRAM if possible.
Brick Risk: If the power is interrupted during Step 3, the device may become unusable.
Warranty: Opening the casing to reach the test points will void your manufacturer warranty.
Do you have the specific firmware version or drivers downloaded already, or would you like help finding the latest compatible modded files?