How to Sync iPhone Wirelessly with iOS - wikiHow

You can sync content such as music, apps, photos wirelessly with iTunes over your home Wi-Fi network. When connecting your iPhone, iPad, or iPod touch to a power source, it will automatically sync to iTunes. However, this article will walk you through the process of manually forcing your device to sync with iTunes over Wi-Fi when ever you want.
STEPS

1

TAP THE SETTINGS APP FROM YOUR DEVICE’S HOME SCREEN.

2

TAP “GENERAL” FROM WITHIN THE SETTINGS APP.

3

SELECT THE “ITUNES WI-FI SYNC” BUTTON.

4

TAP THE “SYNC NOW” BUTTON TO AUTOMATICALLY SYNC YOUR DEVICE WITH ITUNES OVER YOUR HOME WI-FI NETWORK. Note: Both your computer running iTunes and your iPhone, iPad, or iPod touch must be on the same Wi-Fi network.
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TIPS
You can create custom gestures from within the Accessibility section of the Settings app.
iOS 5 provides an all new message app called iMessage that allows you to access text messaging services as well free messaging over WiFi and 3G to any iPad, iPhone, or iPod touch running iOS 5.
WARNINGS
iOS 5 is only compatible with iPad, iPad 2, iPhone 3GS, iPhone 4, and iPod touch 3rd and 4th generation.