Just recently my iPhone stopped connecting to my home router.
It works elsewhere but is not connecting at home. My laptop connects, but not my iPhone any longer. When it asks me to choose a network - I select my home network and enter the password, and it then says "unable to join the network "alexander" which is the name of my home network.
When I tap the blue circle, there is no IP address or anything else entered on that page - but I don't know if there was ever anything there when it was working - as I had no reason to look there when it was working.
I know what the password is, as I have it written down, but I have also tried two other passwords - and it never says that it is an incorrect password, it just says
unable to join the network.