E5573s320 Usbloaderbin Work Review
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 e5573s320 usbloaderbin work
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.
Information regarding the Huawei E5573s-320 and its usbloader.bin file is primarily documented in technical community forums and firmware recovery guides rather than academic papers. This file is a critical emergency bootloader utility used for unbricking, unlocking, or debranding the device. Role of usbloader.bin
The usbloader.bin acts as an external bootloader that is loaded into the modem's RAM when the device is in an emergency state (often called "Download Mode" or "3G PC UI Interface" mode).
Emergency Recovery: It is used when the firmware is corrupted and the modem cannot boot normally.
Flash Access: Once loaded, it enables the modem to accept new firmware images (BIN or EXE) via tools like the Balong USB Downloader.
Data Risks: Standard usbloader.bin files from Huawei can erase NAND flash memory, potentially wiping unique factory data like IMEI and Serial Numbers. Modified "safe" versions, often named usblsafe.bin, are preferred by enthusiasts to prevent this data loss. Workflow for Using usbloader.bin
The process typically follows a "bootshot" or "test point" method to force the device into a state where it can accept the loader.
Disassembly: The modem must be opened to access the motherboard.
Bootshot Method: A specific "boot pin" on the board is shorted to the ground (often the USB metal shield) using tweezers while connecting the device to a PC via USB.
Driver Recognition: If successful, the PC identifies the device as Huawei Mobile Connect - 3G PC UI Interface or similar. If you’ve repeatedly seen "Send Data Fail" or
Loading the Binary: The Balong USB Downloader utility is used to select and "load" the usbloader.bin into the device.
Firmware Flashing: After the loader is active, the user can then flash the desired firmware or WebUI using standard update tools. Common Issues and Resources
Bricking: Using the wrong loader version for specific firmware can result in a permanent brick where no lights appear on the device.
Finding Files: Community repositories like forth32's GitHub and forums like Hovatek or 4PDA are the primary sources for these binaries.
Are you attempting to unbrick a dead device, or are you looking to unlock it for use with other network providers?
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. Warning: This voids your ability to use the
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’ve repeatedly seen "Send Data Fail" or "Cannot find device," follow this surgical timing guide.
For 5% of E5573s-320 units (usually those with firmware version 21.333.x or higher), the stock loader doesn't work because Huawei blocked the debug interface. In this case, you need to hex-edit your usbloader.bin.
Warning: This voids your ability to use the stock recovery method.
Not usually. Different chipsets (Balong V7 vs V9) require different loaders. Using the wrong one can brick the device.
Common scenarios include:
In all these cases, the usbloader.bin acts as a low-level loader that communicates with the device’s CPU before the main firmware loads.
Before diving into the flashing process, let’s understand the hardware.
Look on:
Avoid random file-sharing sites. Always check file hashes against known good ones.