The E5573s-320 is a great little router once freed from carrier limitations. The usbloader.bin method is the cheapest (free) way to unlock its full potential – but the devil is in the driver details and timing.
If you’re stuck, check your COM port number and try a different USB cable (data transfer capable, not just charging). Good luck.
Have you successfully unlocked your E5573s-320? Let me know in the comments which carrier firmware you had.
Comprehensive Guide: Unlocking Huawei E5573s-320 Using USBLoader.bin
Unlocking the Huawei E5573s-320 (often branded by networks like Smart Bro or Zong) allows you to use SIM cards from any carrier worldwide. A critical part of this "forced" unlocking process involves using a file called usbloader.bin and the Balong USB Downloader tool. What is USBLoader.bin?
The usbloader.bin file acts as a temporary "bootstrap" that allows the modem to accept third-party firmware. It is essential for bypassing Error 19, which occurs when the modem rejects a direct firmware update due to security locks. Step-by-Step Unlocking Process
Note: This process requires disassembling your device and may void your warranty. 1. Preparation and Tools Ensure you have downloaded the following necessary files:
Huawei USB Drivers: Specifically for the 3G PC UI Interface.
Balong USB Downloader: The tool used to "push" the loader file.
The correct usbloader.bin: Ensure the version matches the E5573s-320 (often included in firmware packages like 21.110.9). Modem Firmware and WebUI: To be installed after the loader. 2. The "Boot Shot" (Download Mode)
Since standard software commands often fail, you must manually trigger the modem into download mode: Disassemble the modem to access the motherboard.
Locate the boot pin (typically a small circular contact near the USB port).
Short the pin: Use a pair of tweezers or a metal wire to connect the boot pin to the USB housing (ground).
While holding the short, connect the device to your PC via USB.
If successful, your PC's Device Manager will show Huawei Mobile Connect - 3G PC UI Interface. 3. Flashing the USBLoader.bin Open the Balong USB Downloader as an administrator. Click Detect to ensure the COM port is recognized. Select the usbloader.bin file specific to the E5573s-320.
Click Load. Once finished, the modem's LED may change or stay off, but it is now ready for firmware. 4. Installing Firmware and WebUI
Run the firmware update (.exe) provided for your model. The universal loader you just flashed should now prevent Error 19.
After the firmware, install the WebUI to restore the browser-based dashboard. Troubleshooting Common Issues
USBLoader rejected: Some newer firmware versions (e.g., those ending in .306) may not support older loader files. You may need a specific "signed" version for newer security patches.
Device "Bricked" (No Lights): If the modem shows no signs of life after flashing, it may be stuck in the loader interface. You must try to flash a compatible original firmware to recover it.
IMEI Lost: Flashing a new loader can sometimes wipe your device's identity. Use AT commands like AT^CIMEI="Your_Original_IMEI" to restore it. Recommended Resources
The Hovatek Forum Guide provides detailed photo instructions for the boot pin locations.
The RouterUnlock PDF on Scribd specifically addresses the Error 19 fix using this method.
Getting the e5573s320 usbloader.bin to work is 30% software and 70% timing. If you fail on your first ten attempts, do not panic. The Huawei Balong chipset is notoriously resilient.
Remember the checklist:
Once you see that green "Download OK" message, you have saved your router from the electronic graveyard. Bookmark this guide, share it on modding forums, and enjoy your fully functional E5573s-320.
Disclaimer: Modifying router firmware may void your warranty and local telecom regulations. The information provided is for educational purposes and recovery of devices you own legally.
The keyword " Go to product viewer dialog for this item. usbloaderbin work" refers to the essential process of using an emergency bootloader file (usbloader.bin) to repair or unlock the Huawei E5573s-320 mobile Wi-Fi router Go to product viewer dialog for this item.
. This process is typically required when a device is "bricked" (unresponsive) or when standard firmware updates fail due to "Error 19". What is usbloader.bin?
The usbloader.bin is an emergency boot file that allows a computer to communicate with the Huawei E5573s-320's
hardware at a low level, bypassing the standard operating system. It is used in conjunction with the Balong USB Downloader tool to prepare the modem for a fresh firmware installation. When Does e5573s-320 usbloader.bin Work? This method is primarily utilized in two scenarios: e5573s320 usbloaderbin work
Unlocking for All Networks: To use SIM cards from different providers, the device often requires a "universal" firmware. If the current version is locked or too new to allow downgrading, the usbloader.bin bypasses these restrictions.
Fixing Error 19: This error occurs when the device rejects a firmware update because the version is incompatible or restricted by the carrier.
Unbricking: If the router does not turn on or is stuck in a boot loop, this low-level flash can restore functionality. Step-by-Step Recovery Process
Performing this repair requires hardware access and specific software tools, such as those discussed on Hovatek and RouterUnlock. Hardware Preparation (Boot Shot): Disassemble the modem to expose the motherboard. Locate the boot pin (test point).
Use a metal pin or tweezers to "short" the boot pin to the ground (often the USB connector body) while connecting it to your PC via a USB cable. Driver Installation:
If successful, the PC should detect a new device, typically as "Huawei Mobile Connect - 3G PC UI Interface" or "USB_COM" in the Device Manager. Loading usbloader.bin: Open the Balong USB Downloader as an administrator. Click "Detect" to ensure the COM port is recognized.
Select the correct usbloader.bin file specifically for the E5573s-320 variant.
Click "Load." The progress bar should move steadily as the file is sent to the modem. Flashing Firmware:
Once the loader is successfully sent, the device enters a state where it can accept new firmware.
Run the desired firmware update (EXE file) immediately to complete the recovery. Common Issues and Risks
IMEI Loss: Flashing an emergency loader can sometimes reset the device's IMEI to "000000000000000". This requires manual repair using AT commands like AT^CIMEI="Your_IMEI" after the flash is complete. Wrong Loader Version : Using a usbloader.bin for a different variant (like the E5573cs-322 Go to product viewer dialog for this item.
) can permanently brick the device. Always verify your specific sub-model.
Error 10 (Find Port Failed): This usually indicates a driver conflict. Using a registry fix or the Hovatek BOS Solution can resolve port detection issues.
The file usbloader.bin for the Huawei E5573s-320 is a critical utility used primarily for "unbricking" or flashing custom firmware on this specific mobile Wi-Fi router. Does it work?
Yes, it works, but its effectiveness depends entirely on using the correct version for your specific hardware revision. In the community of modem enthusiasts and developers, the usbloader.bin for the E5573s-320 is generally reviewed as reliable for the following tasks:
Forcing Download Mode: It allows the device to be recognized by a PC when it is stuck in a boot loop or "bricked" state.
Firmware Downgrading: It is often the first step in bypassing security restrictions to install "modded" firmware that allows for frequency locking or IMEI changes.
Unlocking: It is a standard tool used in the process of removing network provider locks. Technical Performance Review
Compatibility: This specific loader is tailored for the "s-320" variant. Using a loader meant for the "s-856" or "s-606" on an "s-320" will result in a failure to initialize the USB port.
Stability: Once the loader is successfully "pushed" to the device (usually via a tool like Balong USB Downloader), the modem enters a stable state where it can accept firmware files via fastboot or specialized flashing tools.
Ease of Use: It is not a plug-and-play file. It requires technical knowledge of:
The "boot shot" or "test point" method (physically shorting two pins on the motherboard to trigger recovery mode). Specific drivers (Huawei Mobile Connect drivers). Command-line or specialized GUI flashing tools. User Consensus
Users on technical forums like 4PDA and GSM-Forum report that while the file itself is functional, the primary "fail point" is often poor-quality USB cables or incorrect driver installation rather than the .bin file itself. Risks to Consider
Hardware Damage: If you use the "test point" method incorrectly, you can permanently short the board.
Permanent Brick: Flashing the wrong firmware after using the loader can lead to a "permanent brick" if the bootloader is locked or incompatible.
usbloader.bin file for the Huawei E5573s-320 is a critical process for unbricking, debranding, or unlocking the device. This file forces the modem into a state where it can accept new firmware, even if the current system is corrupted. Prerequisites Before starting, ensure you have the following tools: Balong USB Downloader : The primary software used to load the Huawei Drivers : Specifically the Huawei Mobile Connect - Interface
drivers, which allow your PC to recognize the modem in "Download Mode". Bootshot Tool : Tweezers or a thin wire to short the boot pins. E5573s-320 USB Loader : The specific usbloader.bin compatible with the s-320 variant. Step-by-Step Procedure Enter Download Mode (Bootshot) Disassemble the modem and remove the battery. Locate the (typically a small copper point on the PCB) and the
Use tweezers to bridge (short) these two points while simultaneously plugging the device into your PC via USB. Your computer should detect a new device, often labeled as HUAWEI Mobile Connect - DownLoad Port (usually COM port 3G). Run Balong USB Downloader Balong USB Downloader software on your PC. to ensure the COM port is recognized. field, browse and select your usbloader.bin
. The modem's LED indicators may flash or stay steady once the loader is successfully injected. Flash Firmware Once the loader is active, the modem is ready for flashing.
Open your firmware update tool (e.g., Huawei Flasher or a standard firmware EXE). Follow the prompts to install the new firmware and Web UI. Troubleshooting Tips The E5573s-320 is a great little router once
: This often occurs if the drivers are not properly installed or the wrong loader file is used. Restart your PC and re-verify the device variant. No Port Detected
: Ensure you are holding the bootshot bridge firmly until you hear the Windows "device connected" sound. Device Version
: Some newer firmware versions may block older loaders; ensure your usbloader.bin is the latest version for the s-320. or a specific firmware version for the s-320?
For the Huawei E5573s-320, the usbloader.bin file is a critical emergency tool used to push the modem into a state where it can accept new or modified firmware. This process is typically used to bypass "Error 19" when attempting to unlock the device from a specific network. How the usbloader.bin Works
The usbloader.bin acts as a temporary primary bootloader that runs in the device's RAM. It is required when the standard firmware update mode is restricted or the device is soft-bricked.
Balong USB Downloader: This Windows utility is the standard tool used to "send" the .bin file to the modem via a COM port.
Emergency Mode (The "Needle" Method): To use the loader, you must manually short a specific "boot pin" (test point) on the motherboard to the ground while connecting it to your PC.
usblsafe vs. usbloader: Standard loaders often erase the NAND flash (factory data like IMEI); "safe" versions (usblsafe.bin) are patched to skip this erasure to prevent losing your device's unique identification. Step-by-Step Recovery/Unlock Process balong-usbdload/README.md at master - GitHub
The usbloader.bin file for the Huawei E5573s-320 is a specialized firmware component used to bypass software restrictions, such as network locks, or to recover a "bricked" device. It works by allowing the modem to enter a low-level download mode, typically after a physical "boot shot" (short-circuiting a specific pin to the ground), which enables the flashing of custom or downgraded firmware without standard security checks. How usbloader.bin Works
The core function of usbloader.bin is to serve as a bridge between the device's hardware and flashing software like the Balong USB Downloader.
Initialization: When the modem is in boot mode (detected as BOOT_3G), the loader file initializes the device's RAM to accept larger firmware files.
Permission Bypass: It is often used to resolve Error 19, a common issue where the standard update software rejects a firmware file because it doesn't match the current provider's signature.
Debranding and Unlocking: By loading this file, users can install "universal" or "openline" firmware that allows the modem to accept SIM cards from any carrier. Usage Process
Using usbloader.bin is a technical process that involves disassembling the modem.
Preparation: The modem is stripped to the motherboard to access the boot pin.
The Boot Shot: A metal tool, such as a tweezer or pin, is used to short the boot pin to the USB port's metal shield while connecting the USB cable to a PC.
Detection: If successful, the computer will detect the device under a COM port (e.g., Huawei Mobile Connect - 3G PC UI Interface).
Flashing the Loader: The Balong USB Downloader is used to select and "load" the usbloader.bin file.
Firmware Update: Immediately after the loader is flashed, the user can run the official firmware update software to install the desired OS version. Risks and Critical Notes
IMEI Loss: Flashing this file can sometimes damage the modem’s IMEI or dashboard information, requiring manual repair using AT commands like AT^CIMEI="[Your_IMEI]".
Compatibility: It is vital to use a loader file specifically designed for the E5573s series; using an incorrect version can lead to a hardware fault where the modem is stuck in emergency mode with no lights functioning.
Recovery Alternatives: For minor software issues, users should first attempt a factory reset using the physical reset button under the battery cover before resorting to low-level flashing.
Are you trying to unlock a modem for a specific carrier, or are you attempting to recover a device that won't turn on? Cannot Flash Huawei E5573s-856 modem - Hovatek
This is a niche, technical topic centered on unbricking or unlocking the Huawei E5573s-320 mobile hotspot. To get the usbloader.bin working, a user typically needs to bypass standard firmware restrictions using a "boot pin" (test point) method.
The following blog post is designed for a tech-savvy DIY audience, focusing on troubleshooting the common "Error 19" and providing a clear sequence for using the loader file.
How to Fix Huawei E5573s-320: Unlocking & Error 19 Fix Guide
If you’ve tried to flash your Huawei E5573s-320 only to be met with the dreaded Error 19, you aren't alone. This happens because newer firmware versions are locked down by manufacturers to prevent unauthorized modifications.
To get your usbloader.bin to actually "work," you have to trick the device into a low-level download mode. 1. Preparation: The Gear You Need
Before starting, gather these essentials to avoid bricking your device permanently:
Huawei Mobile Drivers: Ensure your PC recognizes the device ports. Have you successfully unlocked your E5573s-320
Balong USB Downloader: The primary tool used to push the loader file.
The Correct Loader: For this specific model, you need the usbloader.bin specifically compatible with the E5573s series.
Tweezers or a Paperclip: You’ll need these for the "boot shot" (short-circuiting the test point). 2. The "Boot Shot" Method (The Secret Sauce)
The reason your USB loader often fails is that the device is in the wrong mode. To force it into the correct state:
Dismantle the device: Carefully remove the back cover and battery.
Locate the Boot Pin: There is a specific contact point on the motherboard (often near the antenna ports) that must be grounded.
Short the Pin: Use your tweezers to touch the boot pin and the metal shield (ground) simultaneously.
Connect to PC: While holding the short, plug in the USB cable. Your PC should make a "connected" sound, and you can release the short. 3. Loading the bin File
Once your device shows up in Device Manager as "Huawei Mobile Connect - DownLoad Port" (or similar), it's ready: Open the Balong USB Downloader tool. Select the detected COM port.
Click the "Load" button and select your e5573s_320_usbloader.bin.
If successful, the lights on your device might blink or change, signaling that the device has accepted the temporary bootloader and is ready for a firmware flash. 4. Troubleshooting Common Issues
Error 19 still appearing? This usually means the boot shot didn't "stick." Try the process again, ensuring the battery is removed or inserted according to your specific sub-model's requirements.
Device not detected? Check your drivers or try a different USB port. "Error 10: Find port failed" is a common driver-related headache. Final Word
Using a usbloader.bin is a powerful way to regain control of your E5573s-320, whether you're trying to use a different SIM card or repair a corrupted IMEI. Just remember: hardware modification carries risks. Always double-check your file versions before hitting "Start."
The usbloader.bin file for the Huawei E5573s-320
is a specialized bootloader utility used to repair, unlock, or re-flash the device when standard firmware updates fail or the modem is "bricked". It is primarily a tool for technician-level maintenance rather than a consumer feature. Core Functions & Use Cases
Emergency Recovery: It allows the modem to enter a "Force Download" or "Boot Mode" when it is otherwise unresponsive.
Fixing Error 19: A common fix for "Error 19" (failed firmware flashing) which occurs when the device has a newer, locked firmware that prevents downgrading.
Unlocking: Essential for the "boot shot" method to unlock devices from specific carriers (like Smart Philippines) to accept any SIM card.
IMEI Repair: Facilitates access to low-level AT commands required to rewrite or fix a damaged IMEI. Operational Requirements
To use usbloader.bin successfully, the following environment is typically required:
Hardware Preparation: Often requires dismantling the device to "short" specific boot pins (the "boot shot" method) while connecting via USB.
Software Tools: Used in conjunction with tools like Balong USB Downloader and appropriate Huawei Modem Drivers.
Detection: Once the loader is correctly injected, the PC should detect the device as a specific COM port (e.g., BOOT_3G), allowing for new firmware installation. Standard Device Features (Post-Repair) Once the modem is operational, the E5573s-320 provides:
LTE Cat 4 speeds: Supports up to 150 Mbps download and 50 Mbps upload.
Multi-user Support: Connects up to 10 wireless users and 1 USB user simultaneously.
Portable Connectivity: Features a 1500mAh battery providing approximately 4–6 hours of active use.
Caution: Using usbloader.bin involves low-level hardware and software modification. Mistakes in this process can permanently disable (brick) the device.
If you followed the steps but still see errors, here is the diagnostic checklist:
| Error Message / Symptom | Likely Cause | Solution |
| :--- | :--- | :--- |
| "No device found" | Driver conflict or wrong USB port | Uninstall all other modem drivers. Use USBDeview to remove old Huawei entries. |
| "Send data timeout" | Wrong usbloader.bin version | Verify the MD5 checksum of your file. Redownload from a trusted source (e.g., 4pda). |
| Tool freezes at 3% | Power loss during flash | Use a powered USB hub. The E5573s-320 draws peak current during loader injection. |
| Device shows "Unknown USB Device (Device Descriptor Request Failed)" | Corrupted NVRAM | You cannot fix this with usbloader.bin. You need a full bootloader unlock via JTAG or a hardware programmer. |
| Loader sends, but router stays dark | Battery voltage too low | Use a fully charged battery. Do not rely on USB power alone for the s-320. |
In the context of Huawei modems and hotspots, usbloader.bin is a low-level bootloader image. It is not the full firmware (OS). Instead, it is the minimal code that initializes the device’s hardware (CPU, RAM, USB controller) and allows the device to enter a special recovery or flashing mode, often called Download Mode or 1.0 Mode (visible as "1.0" in the USB port description on your PC).