Apple Releases iOS 4 With Multitasking, iBooks, and More

As expected, Apple today released iOS 4, the company's next-generation operating system for the iPhone and iPod touch. A number of readers are reporting that the update has just gone live, although availability appears to still be rolling out across all users. Those looking for the update can connect their devices to iTunes and click the "Checking for Update" button.

iOS 4 brings over 100 new features, including multitasking, folders, Mail improvements, iBook support and more. The operating system is compatible with iPhone 3G, 3GS, and 4, as well as second- and third-generation iPod touch models. Not all features are compatible with all devices, however, with features such as multitasking, custom wallpaper, and Bluetooth keyboard support requiring a minimum of an iPhone 3GS or third-generation iPod touch.

Users report that the iOS 4 build number (8A293) is the same as that released to developers as the Golden Master Candidate earlier this month.