@rhfahim Hi, welcome to our community. Before reconfiguration, please use a pin to press the reset hole for 1 second. Then, you may follow this guide to reconfigure Deco E4: Deco Setup Walkthrough

@LRBT Hi, welcome to our community. You may refer to this guide to adjust the location of your Decos: How can I find a suitable spot for my Deco? For your situation, to exclude the issue is only from...

@Kat23-_ Hi, thanks for posting question here. May I confirm you have installed 3 Deco M4? What is your exact network topology? It is suggested to follow this troubleshooting guide: Troubleshooting...

@mousehunt Hi, thanks for posting question here. May I confirm some information to understand your situation better? 1. How many Deco S4 do you have? Is your Archer C9 connected to main S4 or...

@PRV Hi, thanks for posting question here. May I confirm what are your client devices that failed to connect to 6GHz band? If possible, please share their model and OS, and the screenshot of the...

@Quent155 Hi, thanks for posting question here. As only Decos can set up Deco mesh network with each other, it is more recommended to choose another Deco to work with your P9 for a mesh network. The...