@DocXmas 

I can help you with the technical setup. Here's how to configure your Deco units to work as access points with your ER605:

Step-by-step guide to switch Deco to Access Point Mode:

1. Connect the main Deco unit to your ER605 router via Ethernet cable (use a LAN port on the ER605).

2. Ensure your phone is connected to the Deco Wi-Fi network (this is important • you won't be able to change the operation mode otherwise).

3. Open the Deco app and navigate to MORE > Advanced > Operation Mode.

4. Switch to Access Point mode.

5. If you plan to connect all Deco units to your ER605 via Ethernet to utilize Ethernet Backhaul, setting them to Access Point Mode is essential • otherwise Ethernet Backhaul won't function properly and may cause network issues.

Important notes:
• Make sure your Deco Wi-Fi network name is different from any other Wi-Fi network name you might have
• After switching to Access Point mode, some gateway features (QoS, Parental Controls, DHCP Server, IPTV, VLAN, and DDNS) will no longer be available in the Deco app, as the ER605 will handle these functions

Regarding call quality issues:
Once you have the Decos set up as access points, if you still experience issues with Teams or Zoom, ensure that:
• Your devices are connected to the nearest Deco unit with strong signal
• They're using the 5GHz band instead of 2.4GHz for better performance
• Any satellite Deco units show at least 2 bars of signal strength in the app

If none of the above steps help please reply back to this thread. 

  @DocXmas 

Hi, 
If your Deco is not configured successfully, please try the following steps.
  1. Power on just one Deco node, press the reset button on the Deco for one second to factory reset it, connect it to your router ER605's LAN port, and then follow the instructions below to set up the main Deco.
      How to Set Up Your Deco

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  2. After the main Deco is configured successfully, you can refer to the following instructions to add the Satellite Deco.
      How to Add Another Deco to Your Existing Network
 

If you fail to set up the main Deco, please refer to the following instructions to troubleshoot: Main Deco Failed to Complete Setup
 

Once the Deco nodes are configured successfully, you can refer to this post to set up the Deco in AP mode.

Best Regards