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Click "Load." The progress bar should move steadily as the file is sent to the modem. :
| Error Message / Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | | 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. |
Windows will likely install "Huawei Mobile Connect - PC UI Interface". That’s wrong.
No. The loader only gives temporary access to flash memory. You still need to change the lock status via NVRAM edits or an unlock code.
If successful, your PC should detect a new COM port, often labeled as HUAWEI Mobile Connect - DownLoad Port Loading the Binary
Best downloads on iTunes.
Click "Load." The progress bar should move steadily as the file is sent to the modem. :
| Error Message / Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | | 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. | e5573s320 usbloaderbin work
Windows will likely install "Huawei Mobile Connect - PC UI Interface". That’s wrong. Click "Load
No. The loader only gives temporary access to flash memory. You still need to change the lock status via NVRAM edits or an unlock code. | | "Send data timeout" | Wrong usbloader
If successful, your PC should detect a new COM port, often labeled as HUAWEI Mobile Connect - DownLoad Port Loading the Binary