@Xinseo We have replied to you. https://community.tp-link.com/en/home/forum/topic/179556

@Xinseo For the US version, the Deco supports band 1 only; And it is not supported to change the wireless settings manually. While cause your devices support band 4 only, we will email you and try to...

@shahjrahman The Deco M5 supports router mode and AP mode both; if you want to use the SKY router as well, you can use the Deco M5 as the access point to boost the wifi signal. For the differences...

@niceguy123 Read this thread please. https://community.tp-link.com/en/home/forum/topic/179606

@Erica1 Try to turn off the other two Decos which work properly; After that, please verify whether you can detect any TP-Link Deco wifi networks with your device when the 3rd Deco powered on....

@niceguy123 Hello, please read the reply on your another thread. https://community.tp-link.com/en/home/forum/topic/179606