If what was posted by AppleInsider is true, the most talk about and greatest limitation of iPhone OS (in iPhone, iPod Touch, iPad) will soon become a history. Multitasking, one of the last missing piece (beside flash) in iPhone OS is said to be delivered on iPhone OS 4.0 update.

Devices running iPhone OS does capable of supporting multitasking although in limited fashion. By default, Iphone OS only let it’s application such as iPod, email and SMS to run in the background when user open another application. In contrast, third party application will automatically closed if other application is opened. The lack of this feature inviting criticism from rival who’re making fun of this in their marketing campaign, as well as fans who frustrated with the lack of the support.

ProSwither is one of free app that can enable multitasking in iPhone. But ProSwitcher only available in Cydia, which means the iPhone need be  jailbroken to have this app installed.

But having multitasking feature by default in the iPhone OS is a much better solution for all. Not everyone willing to jailbreak their devices, as it will break the warranty as well as making it vulnerable to virus and other security threat (if the default root password not changed after jailbroken process).

Unfortunately no date given when iPhone OS 4.0 will be released.