This article explains How to Setup ASUS wireless router using your mobile.
Step 1 : Connect ASUS router correctly with network cable
The LAN port is used to connect the computer, and the WAN port is used to connect the Internet. Connect the WAN port with the network cable, and you will see the light of the router turn green. This means that the router is connected to the Internet.
Go to "Settings" > "Wi-Fi"
Switch the "Wi-Fi" and connect the Wi-Fi "ASUS_70"
When you have connected to the WiFi of ASUS router, it will automatically jump to the management address of ASUS Router : http://router.asus.com
Step 2 ：Setup ASUS router with IPhone
Create a new login password
Click "Next" button. Set Network Name (SSID) and Wi-Fi password. Then, click "Apply" button to save your settings.
Now, you have successfully set up ASUS router with your iPhone.