How to unbind the slave device if the master device of the MESH suit is lost

I bought a factory bound T8 (2 units), but the main device is damaged or lost. How to unbind and use the secondary device

STEP 1: 

Power up the router and connect any LAN port of the router to the PC using a network cable

STEP 2:

Configure the computer IP as the IP address of the static 0 network segment

If unclear, please refer to: How to Configure a Static IP Address for a PC.

STEP 3:

Open the browser and enter 192.168.0.212 in the address bar to enter the management page

STEP 4:

After unbinding, the router will restore its factory settings. 

After completion, you can re-enter the management page through 192.168.0.1 or itoolink.net