LifeHack: Achieve real multitasking on iOS

Let’s face it, multitasking doesn’t really exist on the iOS for third party apps. Even the new “multitasking” features of iOS 4.0 is only task switching — not real multitasking since 3rd party applications get frozen when it enters the background. For example, while the Dropbox app is downloading a large file, you can’t switch…