@GlennJ0158 Hi, Deco S4 is one member of the Wi-Fi 5 Deco Mesh family. https://www.tp-link.com/us/deco-mesh-wifi/product-family/ All our Deco models can be mixed to work together. It is quite like...

@GlennJ0158 Hi, can I have a screenshot of the notification "App Update -- Deco null is available" ? It might be related to a new Deco APP upgrade and sometimes you could find the APP release note in...

@Rio1Norton Hi, May I know the model number of your Deco? What is the LED status on the main Deco? It is also suggested to refer to the following suggestions: Unable to connect to the Internet Best...

@SteveGag Hi, Thank you very much for your time and patience. Here is some information for your reference: 1) Do I need to leave the main unit hard connected to my WiFi modem Yes, the first main Deco...

@DEPUTYDICKK Hi, as for the VPN configuration, you can refer to Deco VPN Configuration Guide. Best regards.

@firperson Hi, Do you plan to connect a mobile device, such as a smartphone from 5GHz to 2.4GHz Wi-Fi? May I know why, since 5GHz is usually faster than 2.4GHz. Thank you very much and best regards.