Signing up for iCloud
It's really easy to sign up for an iCloud account. All you have to own is an Apple device. Why? Unlike any other services, you cannot sign up for iCloud directly from its website. You must sign up directly from any Apple device, including Mac, iOS devices (except Apple TV), and Windows PC.
System requirements
Before we go through to sign up process, make sure that your devices meet some recommended system requirements.
iOS devices
To use iCloud with proper experience, your iOS devices should meet following system requirements:
iOS version: iOS 5 or later. Availability of iCloud features depends on the iOS version.
Devices:
iPhone 3GS or later
iPad 2 or later (including iPad mini)
iPod touch third generation or later
Mac
To use iCloud with proper experience, your Mac computer should meet following system requirements:
OS X Lion 10.7.5 or later
iTunes 11 or later (for iTunes in the Cloud and iTunes Match)
iPhoto 11 version 9.4 or later, or Aperture 3.4 or later (for Photo Stream...