Hello, 
 

I bought the deco M4R hoping to extend easily my wifi coverage at home using Mesh. 
 

I don't understand something, I have 4 deco, the master one in the office in one corner of the house. I have 3 others in different rooms. 

Why do the 3 other deco use the office one as main signal? Isn't the purpose of Mesh to share the signal across the deco? In the ios app, I can see the main source but cannot change it. I tried the optimization, didn't change anything. 

Latest update has been downloaded to the deco.