: Under normal conditions, once usbloader.bin successfully runs, the single "DownLoad Port" will disappear, and the device will instantly reconnect, showing two or three new ports (including a PCUI Port and a Modem Port ). If the ports disappear and never come back, the loader has crashed inside the modem RAM.

For those who prefer open-source tools, projects like balong-usbdload and balong-malalim exist on GitHub. These command-line tools perform the exact same function of loading usbloader.bin via an emergency serial port. However, these utilities come with a stark warning:

In the simplest terms, usbloader.bin is a low-level emergency bootloader for Huawei devices based on the Balong chipset. Think of it as a last-resort utility that can kick-start a device whose main operating system (firmware) has been corrupted.

Release the tweezers after 2-3 seconds. Your PC should make a connection sound, but the router's LEDs will remain completely off. 3. Verify Hardware Detection Open on your Windows PC. Expand the Ports (COM & LPT) subsection.

The usbloader.bin on the E5573s-320 if you have the exact file matching your device’s hardware and bootloader version. However, for most users, you will never need to touch it. Standard firmware updates via the web interface (192.168.8.1) or SD card are safer.

If you need help finding specific usbloader.bin files for your exact E5573s-320 firmware, I can try to help you locate them. Share public link

, 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:

Choose the COM port corresponding to BOOT_3G .

Balong SignCheck/secuboot signature mismatch on custom firmware.