Wi-Fi sync may be used to keep photos, videos, music, and apps in sync without having to connect the handset to a PC or Mac via the USB cable.
Before proceeding, ensure both the computer and handset are connected to the same wireless network.
Connect the phone to a PC or Mac via the supplied USB cable.
Note: This feature requires the latest version of iTunes. Visit http://www.apple.com/itunes/ for more info.
Open the iTunes application on the computer, then click iPhone.
Note: If the sidebar is displayed, click the iPhone name under DEVICES.
From the Summary tab, scroll to Options and check the box to Sync with this iPhone over Wi-Fi.
Click Apply and unplug the USB cable.
The handset will sync with iTunes over Wi-Fi automatically whenever it is plugged in to a power source and connected to Wi-Fi.
To sync manually, tap Settings.
Scroll to and tap General.
Scroll to and tap iTunes Wi-Fi Sync.
Tap Sync Now.
The phone is now synchronized.