Users on technical forums like 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
This is an advanced recovery technique. Steps to Make the Loader Work Download the correct usbloader.bin for E5573s-320.
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 e5573s320 usbloaderbin work
: This is almost always caused by a USB 3.0 incompatibility issue . Disconnect the modem, re-apply the physical hardware short, and ensure you plug the cable into a native USB 2.0 port on your computer. If you are using a modern laptop with only Type-C or USB 3.0 ports, route the connection through an unpowered USB 2.0 hub to throttle down the transmission speeds.
The installation wizard will run past the previous roadblocks without throwing Error 19. Users on technical forums like and GSM-Forum report
Searching for this method usually means the user has attempted a standard unlock or firmware update and encountered a fatal error, most notably . This error typically occurs when you try to flash a new firmware and the update process fails, leaving the router with a corrupted or incomplete system. The device might power on but shows a blank page in its web interface or is no longer recognized properly by the PC.
If successful, your PC’s Device Manager will show . 2. Load the usbloader.bin Open Balong USB Downloader . Click the "..." button and select your usbloader.bin file. The "boot shot" or "test point" method (physically
Remove the battery, SIM card, and the back cover. Unscrew the frame to expose the motherboard.
It turns the "bricked" modem into a USB COM port ( BOOT_3G ), allowing flashing tools to recognize it.
By short-circuiting specific hardware contacts on the motherboard (known as the ), you force the chipset into an emergency download mode. In this mode, the hardware looks for a temporary loader file over the USB serial port.