@rojy1 

Thanks for reminding us that the Deco E4 is not there, we have added it. 

Back to your case, what is the current network diagram? How do you connect these device together? 

And you said there is a periodic discconection, how often it drops connection? What is the led status of the Deco E4 when the connection lost?  

Is it still connected to the Deco's wifi but no internet access or it disconnects from the wifi network totally?

When the wifi lost internet, can you get internet from the Deco by ethernet cable? 

And is there any message on the Deco app? 

Good day. 

@rojy1 

Hello, sorry to respond late. Cause the pc and laptop work well with the Deco network except the Android device, first you can try to upgrade the OS version; 

Then try to forget the network and reconnect to the TP-Link Deco's wifi. 

Meanwhile, please check the IP and gateway obtained by your Android device when it failed to access internet. And try to ping the gateway of the Deco E4. 

You can enable guest network and connect them to the guest network and test the performance. 

Besides, you can hard reset or change their locations to give it a go. 

Good day. 

@rojy1 

Thanks for your reply, and glad to hear that the Archer A7 works well as expected. 

While we are still sorry for the inconvenience caused here. 

If need more help in the future, please feel free to contact us.

Best regards.