iPhone will not connect to my wifi
Is there any IP address assigned? And if so, does it come from your router? (e.g., is it in the same range as a computer or other device that is connected to the same router? ) If it happens to start with 169.254.x.x, then there probably is something wrong with one of the router settings (probably DHCP not configured properly), as that indicates that your iPhone has a self-assigned IP-address. 

You can check the IP-address by opening the Settings app, tapping Wi-Fi, and tap the blue information-icon (i) next to the connected Wi-Fi network. And are the iPad and iPhone the only two devices connected to that router? Or are there other devices that are successfully connected as well?