Apple is all set to launch iOS4 today, iOS4 is the new name for its mobile operating system
software which announced at WWDC 2010, the software will be used on the iPhone, iPad and iPod touch as well.
The new iOS 4 provides a variety of new and enhanced features on a core OS level, on a developer API level, and on the surface for end users. Some of these features are limited to new hardware in the latest iPhone 4 , such as FaceTime video calling, while others – including multitasking – are only available on last year’s iPhone 3GS and third generation iPod touch .