We are using the router AR750. We used the tutorial to setup the portal, but it works different on different devices. We want to create a portal that opens the browser fullscreen and redirects the user to a local site in the network.
Browser for Android by Easyelife, it’s a browser app. Search it in the Google play store. That browser app works for me when I want the captive portal sign in page to open. Just put in a website after you downloaded the browser app and the captive portal sign in page should come right up.