Xiaomi Mi Router 3G Repair - Memory re-flash


My Xaiaomi mi router 3g firmware update was running an update incorrectly, so I updated it via serial port, but accidentally uploaded the wrong file, so now the router is not available via serial port.

How can I re-flash the firmware? Do I need to solder it? The flash memory is still usable, just I need to be re-program?

What is the solution? How can I get it back into use? It has become a brick and is currently unusable.

If the console's dead, you'll need a flash programmer/writer to recover.

The first time I was able to connect to the recovery interface, but I uploaded the wrong firmware version. Now I see an unintelligible interface, it does something but I can't upload the openwrt to it.