@MRibeiro69 

Hi, would Deco turn red during the disconnection?

It is suggested to try to set Deco into "Access Point" mode:

How to set up Deco to work in Access Point mode

Please also disable "EasyMesh" under Deco APP>More>Advanced.

By the way, may I know your internet service provider? How about the model number of the ISP-provided router/gateway?

Thank you very much.

Best regards.

  @MRibeiro69 

Yes, you can use a TP-Link Deco in Access Point (AP) mode with a modem that does not have built-in Wi-Fi. In AP mode, the Deco essentially acts as a wireless access point, extending the network of your existing modem/router. You would connect the Deco to your modem via Ethernet, and it will create its own Wi-Fi network, even if the modem itself doesn't broadcast Wi-Fi. 

Here's a more detailed explanation:

• AP Mode:

  When you set the Deco to AP mode, it doesn't function as a primary router. Instead, it receives an internet connection from your existing modem (or router) via Ethernet and then creates its own Wi-Fi network for your devices to connect to.

• Modem without Wi-Fi:

  Many internet service providers (ISPs) provide modems that only handle the internet connection and don't have built-in Wi-Fi capabilities. In this case, you would connect the Deco to the modem via Ethernet, and the Deco would then provide the Wi-Fi.

• Deco's Role:

  The Deco in AP mode essentially takes the internet signal from the modem and broadcasts it wirelessly. You can then connect your devices (phones, laptops, etc.) to the Deco's Wi-Fi network.

• Benefits:

  This setup allows you to have a stronger, more reliable Wi-Fi network, especially if your modem's built-in Wi-Fi is weak or limited.