Apple iOS 4 to have Multi Tasking Feature: iPhone OS 4- OS 4 may be just a few hours old, but several developers are already rolling out versions of their iPhone and iPod Touch apps for the new OS. Most of the updates we've seen so far just ensure compatibility, or enable fast app switching. But a few, most notably Pandora, enable iOS 4's most wanted feature: multitasking.

Now the thing is, once Apple released iOS 4 for download you just know there is going to be one huge wave of traffic hitting the downloads page, and so there could well be a few issues in grabbing hold of iOS 4 initially.

To get iOS 4.0 on your device, ensure you've iTunes 9.2 installed. Then connect your device to the Mac or PC using dock connector cable while iTunes is still on. When iTunes identifies your device click on 'Check for Updates' button.