Thank you both !
It is ok I know how to manage settings for the both sims and it did work before. I tried to invert them too.
The second sim slot does not seem to work since I do not receive any signal from the second sim. I can see the bars place but there are no bars for signal. The first sim slot work very well. If I invert them, it is my personal sim which does not receive signal.
I am puzzled…