@TP-Link thanks for the quick response. I have not tried to replace the two deco M4 wirelessly operating but since the firmware is the same I thought they were identical. the network optimization...

I have 5 Deco M4. The main one is configured as a ruouter and other 2 Decos M4 are connected with a switch and ethernet cables (cat 6). Everything is working flawlessy. I have added two other Deco...