Listen for the USB connection sound. Open Device Manager on your PC and check for a new COM port, usually listed under "Ports (COM & LPT)" as HUAWEI Mobile Connect - BOOT_3G (or HUAWEI Mobile Connect - 3G PC UI Interface ).
Struggling with the usbloader.bin file for your Huawei E5573s-320? This guide explains what the loader is, common flashing errors, step-by-step fixes, and how to get your portable 4G router working again.
While holding the short, connect the device to your PC via USB. e5573s320 usbloaderbin work
Open a Command Prompt (CMD) window mapped to that directory. Execute the following command structure: balong_usb_downloader.exe -p usbloader.bin Use code with caution. (Example: balong_usb_downloader.exe -p 3 usbloader.bin )
Click "Load" to send the binary to the device. Once the loader is active, you can proceed to flash the actual firmware using a tool like balongflash Related Resources & Tools Listen for the USB connection sound
According to developers, usbloader.bin is "an external boot loader/firmware update tool file". It is the key that forces the modem into a special download mode.
Run scripts or terminal commands (via port access software like PuTTY) to repair variables like the or NVRAM data if they were cleared during the recovery process. This guide explains what the loader is, common
: Using usbloader.bin involves low-level hardware and software modification. Mistakes in this process can permanently disable (brick) the device.
The PC makes the "Found New Device" sound. The download tool changes from "Waiting" to "Downloading... 0%". You should see Sending usbloader.bin...OK .
Here’s what Mira did: