@saimonazad Currently, the Deco M4 5G only works on band 1 and it doesn't support band 4 channels. I have sent you a PM, please check and confirm. Thanks.

@JunkMailKing Hello, you may try to switch this specific Deco node with the 1.1.6 version to work as the main Deco, and disconnect the other two, then you should be able to detect the new firmware....

@DreamTFK Hello, Yes, you may just connect the Deco X60s to the powerline adapters, and the powerline will appear as Ethernet connection to the Deco X60, then the Deco X60s will build up the Ethernet...

@GiGoVX Hello, if you want to visit the local resources, you will need to do port forwarding on the Deco first: https://www.tp-link.com/support/faq/1797/ If you have already finished that but still...

@Javi_C Hello, we can change the wireless security type on the Deco network, go to More-Wi-Fi, tap on the SSID or password dialog box, you will find the option to modify the security options.

Thanks @Alexandre. for your professional suggestions. @W2020 You may also refer to the official website to get some suggestions, you can choose how large of your house, how many floors, and what...