Welcome to the forum, @matthieutorres!
First of all, it seems that you did not read the welcome banner well:
So there is no point in addressing the Fairphone team here.
This is not something Fairphone would want. They want to change the electronics industry where it is happening right now, namely in Asia, and don’t want to bring production to Europe. In my opinion the latter would not proof that a fairer (more social) way of production is possible in China’s factories.
Edit: I’d like to quote the FAQ too: 
I’m closing this topic since