| Error Message | Cause | Solution | |---------------|-------|----------| | "Failed to open COM port" | Wrong port or driver not loaded | Check Device Manager; reinstall USB COM driver. | | "Handshake failed. Timeout" | Device not in Download Mode | Re-enter Download mode (battery out, hold power, insert USB). | | "NAND device not detected" | Wrong flash type selected | Ensure "NAND" (not SPI) is chosen. | | "Verify failed at offset 0x..." | Bad USB cable or power drop | Use a high-quality, short USB 2.0 cable. Disable USB selective suspend. | | "File too large for partition" | Wrong firmware variant | Download firmware explicitly for E5573cs-609 , not E5573s-320 . | | "Bootloader signature mismatch" | Secure boot enabled | You need a signed bootloader. Some tools ignore this—try a different version of Balong Downloader. |
Requires specialized Huawei USB-serial drivers to recognize the device once it enters emergency mode. Firmware Files: Users must provide a compatible usbloader.bin Balong Usb Downloader E5573cs-609-
Using this utility typically involves the following steps as detailed in guides on Preparation : Download the Balong USB Downloader and the specific file for the E5573cs series. Hardware Connection | Error Message | Cause | Solution |