Manage an AirPort network: If iPhone is connected to an AirPort base station, tap 
next to the network name. If you haven’t already downloaded AirPort Utility, the App Store opens so you can get it.
An AirPort base station provides a Wi-Fi connection to your home, school, or small business network. You can use iPhone to set up a new AirPort Express, AirPort Extreme, or Time Capsule base station.
Use the AirPort Setup Assistant: Go to Settings > Wi-Fi. Under “Set up an AirPort base station,” tap the name of the base station you want to set up. Then follow the onscreen instructions.
If the base station you want to set up isn’t listed, make sure that it has power, that you’re within range, and that it hasn’t already been configured. You can only set up base stations that are new or have been reset. Some older AirPort base stations cannot be set up using an iOS device. For setup instructions, see the documentation that came with the base station.
Manage an AirPort network: If iPhone is connected to an AirPort base station, tap next to the network name. If you haven’t already downloaded AirPort Utility, the App Store opens so you can get it.