This article explains how to access your router settings from your phone. Instructions apply to iOS and Android devices.
How to Access Router Settings from an Android Smartphone | Tutorial | Elite Automation
To log in to your router and manage your network settings, follow these steps:
Connect to your wireless network. Your phone must be connected to your router's Wi-Fi network to access the settings.
Identify your router's username and password. Look for a sticker on the back or bottom of your router. If it's not there, do a Google search for your model and check the manufacturer's website.