Turning on iCloud
The following instructions detail how to configure an iPad, iPhone, or iPod Touch to use iCloud if you have not turned it on previously.
1. Tap the Settings icon
2. Select iCloud and enter your Apple ID
3. Tap the On/Off switches to enable individual iCloud services.
4. To enable iCloud Backup, tap Storage and Backup and turn on iCloud Backup.
5. More information on individual iCloud services (such as email, documents, iBooks, etc) can be found here.