Hi  @DecoUser4167568 

Welcome to the community.

First, I recommend making sure your Deco units are optimally placed. Our guide on finding the best placement can help.

If the Deco is in AP mode, some of its advanced Mesh Wi-Fi features may be turned off. Additionally, assigning a separate SSID for your main router and the Deco Mesh AP network may cause your wireless client devices (e.g., your phone) to take longer when roaming from one Wi-Fi node to another.

Lastly, if your main router is not a Deco Mesh device, it will not handle fast roaming as efficiently. Have you considered turning off your main router's Wi-Fi and assigning its Wi-Fi name and password to your Deco Mesh instead?

Alternatively, if your network configuration allows for it, you may consider using the Deco Mesh System as your main Router. Doing so can help ensure all of its Mesh Wi-Fi Features are available and optimally providing seamless Wi-Fi for your devices.