You can modify a variety of wireless network settings in your router's web interface, including its wireless password. By accessing the web-based setup page, it also allows you to view your router's information. But for you to access your router's web based settings, you’ll need your router’s IP address to access it. On this tutorial I will show you how to get your router's IP Address on your iPhone/iPad/iPod.Instruction
1. Open your iPhone or iPad,
2. Open the “Settings” application.
3. Goto “Wi-Fi”, and tap the name of your Wi-Fi network where you are connected. You’ll see the router’s IP address appear to the right of “Router”.