iCloud: Set up iCloud on your devices
Before you can use iCloud, you need to create an iCloud account (using your existing Apple ID if you have one already, or by creating a new one if you don’t), then turn on the iCloud features you want to use on each of your iOS devices and computers.
If you already installed iOS 5 or later on any of your devices, you were asked if you wanted to turn on iCloud. To make sure everything is set up correctly, or to set up your iCloud account on another device, go to the set up iCloud website listed below.
Set up iCloud on your iOS devices and computers
Go to the set up iCloud website.
After you set up each device, iCloud begins to push information to each device. You can also now sign in to icloud.com and start using the iCloud web applications.
For help using any of the iCloud web applications, click a help topic on the left.
For more information about other iCloud features, go to more resources.