I am currently in possession of a samsung j400f and it seems not to connect to wi-fi although i can switch on the wi-fi butoon on the phone.It keeps searching for wi-fi but can noot detect even though other devices can identify nearby wi-fi routers online.I think to repair this you have to downgrade it to 7.0 nougart since 8.0 seems to have this problem.Can someone tell me the correct repair firmware on the z3x support that i can write on this phone to enable it working on wi-fi please!!
