This means your current device firmware is too new and has a locked bootloader. You may need to use the physical "test point" method to jump-start the motherboard before flashing.
Disclaimer: Unlocking a router may void the manufacturer's warranty. Any modifications are performed at the user's own risk. e5577s932 unlock file
The firmware changes the modem core, but the WebUI controls what you see on your browser screen. This means your current device firmware is too
Allow the installation wizard to completely flash the downgraded firmware package. The router screen may turn blank or show a downloading icon. Step 4: Flash the Modified WebUI e5577s932 unlock file
