Using iCloud to back up or restore an iOS device
To back up an iOS device to iCloud, you can turn it ON directly from the device or you can enable it from the iTunes Store. iCloud automatically backs up your device when it's connected to any Wi-Fi connection, a power source, and when the screen is locked.
Turning ON iCloud Backup on iOS devices
To enable iCloud to back up an iOS device from the device, follow the given steps:
Navigate to Settings | iCloud | Storage & Backup.
To enable it, set the iCloud Backup toggle to the ON position.
iOS asks for your confirmation to enable iCloud Backup for the device and it will no longer back up to your computer when you sync it with iTunes.
Tap on Back Up Now to perform iCloud Backup manually.
Turning ON iCloud Backup from iTunes
If you connect your device to iTunes (via a USB cable or Wi-Fi), you can enable iCloud Backup from iTunes, as shown in the following screenshot:
Connect your iOS device to your Mac or PC and launch iTunes.
On iTunes 11, click...