Galaxy J5 connected to wifi but network not available I bought this brand new J5 yesterday, but I'm stuck with a internet connection problem.

The thing is that the wifi connection worked properly on the store and at some other places, but in my home it connects to the wifi but I don't seem to have any network (I open the browser but can't access any url). All others devices that I have in my house work very good (other Android devices).

I'm assuming then that :

A) The J5 is working properly (as I can connect it at another places) ;

B) The wifi in my home is working properly (as others devices connect to it AND can access any url).

It's correct to say that I may be facing than some kind of compatibility issue, between J5 and my wifi ?

If yes, what could I do to solve it ?
I was digging many hours yesterday on the web to find a solution for this but nothing worked so far. By the way, all "J's" devices seems to have a lot of these issues ! 

Thank you.
My dual sim Samsung J5 has problems after restart to find the Provider Connection, so i can't take the calls. The solution to fix this: after every reboot, start your both sim cards, after that you cabt ake calls again and turn of 1 card if u want to save the battery. You have to do this after every phone reboot. It's easy but importend to knowt this solution.