Monday saw the launch of iOS 4, which included multitasking, a unified email inbox and other features. However, it’s notable that not all iDevices will be able to take advantage of iOS 4.
For one, original iPhones and iPod Touches launched in 2007 cannot run iOS 4. The iPhone 3G and second-generation iPod Touch from 2008 can run iOS 4 but multitasking is not supported. Finally, the third-generation iPod Touch from 2009, the iPhone 3GS and the upcoming iPhone 4 are all fully compatible with iOS 4.
The iPad, meanwhile, will not receive the iOS 4 update until Fall 2010.
Source: Wired
