1 Connect your phone The first step of setting up a wireless sync is to connect your iPhone to your computer and open iTunes. Once iTunes has launched, click on your iPhone.
2 Start Wireless Sync In iTunes, click on the Summary tab and under the options section, tick the box next to ‘Sync with this phone over Wi-Fi’. Now click Apply in the iTunes window.
3 Connect to Wi-Fi Unplug the iPhone from the computer and connect to the wireless network. Go to Settings, Network then Wi-Fi. Select your wireless network and enter the password.
4 Sync Wirelessly To make sure that your wireless sync is set up properly plug the iPhone in to a power source. Open the Settings app and tap on ‘iTunes Wi-Fi Sync’.
5 Sync apps The iPhone will now show in iTunes, click on the Apps tab. Here you can choose which apps to sync to your iPhone. You can sort them by kind, name, category, date and size.
6 Sync new apps If you’d like all new apps that you buy to automatically sync to your device, simply check the option ‘Automatically sync new apps’.
7 Sync music If you have a large music collection you may find that your iPhone gets filled up pretty fast. Click on the Music tab to choose which playlists to add. You should also consider adding the iTunes Match service.
8 Wireless speeds It’s worth noting that the speed of your sync can be affected by other traffic on the network. So, if you can, avoid running a sync when you’re surfing the web.
Wired First
If you have loads of apps, music, photos and videos to sync to your iPhone, it’s best to do it over USB before going fully wireless. This makes subsequent syncs much smaller and faster. Once you’ve got all your stuff synced up the incremental additions will be smoother
Read prev...
How to Sync iPhone Wirelessly to iTunes
Taken from : The Complete Guide to the iPhone 5