A new software update is available for iPhones. It offers over 100 new features and you can learn about it by Apple. This new iOS 4 works with iPhone 4, iPhone 3GS, and iPhone 3G.

Not all features are compatible with all devices. For example, multitasking is available only with iPhone 4 and iPhone 3GS. And I have an iPhone 3GS. This is the one feature that I am the most stoked about. It allows users to switch between apps instantly without draining the battery. About time? Yes.