@SayeemAhmed  Show your network map properly (by tapping on "2 decos are offline")

Also, try setting "1st floor" as main deco

  @Lalolelendo yes wired connection all device and routers mode. Main to switch and switch to 2 and 3 router connected. 

  @ImtiazAli  yes wired connection all device and routers mode. Main to switch and switch to 2 and 3 router connected. 

  @Lalolelendo I mean the router is connected but when I access the apps it seems to work in reverse.

  @David-TP Can I connect Deco M4 with Deco X20 router and want to keep Deco X20 as main router and can M4 be connected to another floor with cable connection.

  @SayeemAhmed 

Hi, Thank you very much for your time and patience.

Do you mean a topology like this:

Deco X20 will work well with the three Deco M4 units.

The 1.7.0 beta is a quite stable version.  However, network conditions differ among multiple users. the negative feedback about speed and stability is inevitable.

As for your feedback, is the disconnection error mainly occurring to the Deco APP? The two satellite Deco units actually are solid white and work well?

  @David-TP thank you so much for suggested. 

And when will be available m4 stable version im also unsatisfied this beta version bcoz this beta version is not good performance provided. 

  @Lalolelendo 

Hi,

"The bandwidth improved; I get 300 Mbps. When there is a wall in between, it drops to 150 Mbps. I am not sure if this is normal."

I think the speed is normal.

You could temporarily power off the satellite M4, stand at the same location, and connect the mobile phone to the main Deco to check how much of the internet speed on the mobile phone.

@Ivan_Mitov I must admit that the release of version 1.7.0 has been delayed for a while and is far behind the expected timeline. I would love to share with the community any further news about the 1.7.0 release. However, I am feeling a bit frustrated as there is little I can do to expedite the process.

Thank you very much for your understanding and support.

Best regards.