This process is known as the "emergency recovery flash" because it works even if your current firmware is partially corrupted. It uses the router’s built-in bootloader (BROM mode).
This is the standard manufacturer-approved method for local updates: Run the Tool: Right-click the update tool executable (e.g., zte mc801a firmware flash portable
Connect the router to your PC using a cable and ensure the power adapter is plugged in. The USB-C port is often hidden behind a sticker or a small panel on the bottom/rear. 2. Enter Download Mode (EDL) This process is known as the "emergency recovery