By far one of the best features of iOS is wireless syncing and backing up, as the name implies it allows you to wirelessly transfer apps, music, books, contacts, calendars, movies, photos, everything you had to use a wired sync for, but it’s done through the air. If your device supports iOS 5 or later, it’ll support Wi-Fi syncing, including iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPad, iPad Mini, and iPod touch 3rd & 4th generations.
Wireless syncing requires or later and or later, be sure you have both of those installed (or newer versions) before attempting to enable syncing through wi-fi or else the option won’t be visible. This setup process is the same on Mac OS X and Windows, and is fully compatible with both if you are syncing to the different platforms.
You’ll have to connect your iOS device to your computer to set it up, but after that you’re wire free with the exception of charging the hardwares battery.
From iTunes 10.5+ or later
With the iTunes side enabled, now pick up the iOS device to finish the process:
From iOS 5 or newer
You can also double-check that this is working by disconnecting the iPhone or iPad and then choosing the “Sync” option from iTunes on the Mac or PC, you’ll see the familiar sync screen on your device.
Once wi-fi syncing is enabled and set up properly, the iOS device will automatically sync wirelessly any time the hardware is connected to a power source, including the USB cable, speaker docks, or otherwise. This process will also backup your iPhone or iPad automatically and wirelessly. Other than that automatic process, you can also initiate manual backups and syncing from the iPhone/iPad or from iTunes on the Mac or PC:
Start a Wireless Sync from the iOS Device
At any point you can cancel this by tapping the “Cancel Sync” button.
Start Syncing Wirelessly from iTunes on a Mac or PC
If you want to initiate a manual sync, you can continue do so by selecting that button within iTunes.
If you want to really take advantage of wi-fi syncing and the PC-free experience, don’t forget to sign up for iCloud too. You can , it’s very easy and free for the first 5GB of cloud storage with Apple.
Troubleshooting Problems with Wireless Syncing
There’s a variety of potential issues and fixes, provides has a few helpful tips if you run into any issues:
There doesn’t seem to be any limitation on the number of iPad, , or iPod touch devices that can be used with this, although you may run into the traditional limit of Macs or PC’s that an iOS device can be linked to.
Updated 2/17/2013 for minor adjustments made in iTunes 11 and iOS 6.1