@Pierwitch 

Deco E4 has 100 Mbps Ethernet ports. As long as you keep E4 as Main Deco, 90 Mbps is the fastest speed you can get.

  @Alexandre. 

Thank you for your answer. 

On the box, it is said :

AC1200 Deco E4 specs :

Wireless : 300Mbps on 2.4GHz + 867 Mbps on 5 GHz.

I am on wireless connection so I was expecting more than 90 Mbps.

Any idea please ?

Alexandre. wrote

  @Pierwitch 

 

Deco E4 has 100 Mbps Ethernet ports. As long as you keep E4 as Main Deco, 90 Mbps is the fastest speed you can get.

  @Pierwitch 

How many Deco E4 units do you have? If more than one, do Satellite Deco use WiFi to connect to Main Deco, or you wired them with Ethernet cable?

Deco E4 hardware specifications:

  @Alexandre. 

I have 2 Decos. 1 is connected via ethernet cable to my provider's modem ( my provider's modem was delivering 300Mbps before connecting deco

Alexandre. wrote

  @Pierwitch 

 

How many Deco E4 units do you have? If more than one, do Satellite Deco use WiFi to connect to Main Deco, or you wired them with Ethernet cable?

 

Deco E4 hardware specifications:

 

) and gives 90 Mbps on WiFi. My other Deco is upstairs connected via WiFi (delivers 90 Mbps too). 

  @Pierwitch 

If you can connect two devices such as PCs wirelessly to your Main Deco, and start file transfer between them - you should expect to see faster speeds. Anything at your home network that goes to and from Internet using Deco mesh does it through Main Deco Ethernet port, which is 100Mbps.

There are two options for you in this situation:

1. If you can return Deco E4 for refund - do that. Buy 2-unit set of Deco M4, S4, M5 or M9 Plus instead. Each of these has gigabit Ethernet ports.

2. If you can't return Deco E4, buy single Deco M5, add it to your Deco mesh and promote it to Main Deco. That will unlock faster Internet speeds for your home network. This is how to promote M5 to Main Deco: Changing the Main Unit for your Mesh Network