E5573s-320 Usbloader.bin -
The tool will write the bootloader to the NAND flash’s first sector. You will see a progress bar. It should take roughly 10 seconds. If you see "Error: Security Verify Failed," your bootloader is not signed for that specific device (you need a patched version).
Once the firmware is updated, you can configure the device to your liking. This may involve editing configuration files or using specific software tools. E5573s-320 Usbloader.bin
: Once loaded, the modem "wakes up" enough to accept new commands. The tool will write the bootloader to the