Apple has finally preview their next generation of operating system for iPhone, the iPhone OS 4.0 which is brings many new things, including the functions of multi-tasking, the ability to create a folder, update the email and so on. This OS 4 will be release in this summer.

Ok one of the iPhone OS 4 features is a multi-tasking function. It will allows more than one application simultaneously carried out at one time. However, this multi-tasking function only for the latest iPhone 3Gs and iPod Touch users.

Another big features is a Folder function to enable the interface and the application more structured and organized.

In addition, the iBooks are also introduced, allowing users to read on the iPhone. Function of social games also be integrated, it’s will allowing users to challenge their friends to play a game and compete against each other.

At the same time, Apple also introduced the iAD, a system of mobile advertising concept, Apple will fully manage and provide advertising sales, and profits from it will be devide in the 60/40 concept, where the application developer will receive 60% profits, and 40% taken by Apple. Interestingly, it will use the HTML5, and will look very attractive once on the iPhone.

For iPhoneholic reader, this is the official iPhone OS 4 wallpaper. You can download it and us it to your iPhone.

More info, logon to the iPhone OS 4 Official Site here