Refers to the total number worldwide. Not all content is available in all countries.
iCloud requires iOS 5 or later on iPhone 3GS or later, iPod touch (3rd generation or later), iPad, or iPad mini; a Mac computer with OS X Lion v10.7.5 or later; or a PC with Windows 7 or Windows 8 (Outlook 2007 or later or an up-to-date browser is required for accessing email, contacts, and calendars). Some features require iOS 7 and OS X Mavericks. Some features require a Wi‑Fi connection. Some features are not available in all countries. Access to some services is limited to 10 devices.
Requires iOS 7.
Testing conducted by Apple in October 2013 using production 1.3GHz Intel Core i5-based 13‑inch MacBook Air systems with 4GB of RAM and prerelease OS X v10.9. Tested with prerelease Safari 7.0, Chrome v30.0.1599.69, and Firefox v24.0. Systems tested with WPA2 Wi‑Fi network connection while running on battery power. Performance will vary based on system configuration, application workload, and other factors.
FaceTime calling requires a FaceTime-enabled device for the caller and recipient and a Wi‑Fi connection. Availability over a cellular network depends on carrier policies; data charges may apply.