Open your browser. Touch and hold on any page until a menu pops up. Choose settings. Deselect Block pop-up windows.
I tried that with desktop and mobile browser mode., to no avail. The internet company here requires a web page login. On my iPhone, I connect, it pops up with safari, and brings up the page. I have tried entering the ip for the login into the browser and still nothing. It tells me I am connected, but that is it.