Apple the makers of iPhone introduces its most awaited generation next device and world’s thinnest smart phone iPhone 4.

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The iPhone 4 is sleeker and more advanced than the first iPhone. Like the iPhone 3GS, it comes in black or white, though it has a more angular look. Its front and back are covered with glass, and it is rimmed with stainless steel that acts as part of the antenna.

iPhone 4 comes with multitasking user interface allows its users to quickly switch between recently used apps. Just double-click the Home button to reveal your recently used apps. Scroll right to see more apps, then tap one to reopen it. No need to wait for the app to reload.

The iPhone 4 equipped with FaceTime, which makes the dream of video calling a reality earlier was not available in on iPhone, and Apple’s stunning new Retina display, the highest resolution display ever built into a phone, resulting in super crisp text, image, and video.

iPhone 4 is about three-eighths of an inch thick; the 3GS is nearly half an inch. It can shoot high-def video, catching up to some other smart phones. It has a gyroscope in addition to other sensors, to enable more advanced motion-sensing applications, such as games and mapping services.

The display on the smartphone remains 3.5 inches diagonally, but Jobs noted that it can show four times more pixels the individual coloured dots that make up an image as the previous screen. With its large Multi-Touch display and innovative software, iPhone lets you control everything using just your fingers. A panel laminated on the glass senses your touch using electrical fields. It can register multiple touches at once to support advanced gestures such as pinch to zoom, two-finger tap, and more. The panel then transmits the information to the Retina display below it.