Apple's fourth-generation smartphone is a significant upgrade from the iPhone 3GS, starting with its 3.5-inch, 640 x 960 touchscreen, a much higher resolution than any previous iPhone has offered.
It has a slimmer design and runs iOS 4.0, the latest version of Apple's operating system, on a 1 GHz Apple A4 processor. This is the first version of this mobile OS with support for multitasking.
The iPhone 4 has a 5 megapixel rear-facing camera with a flash and support for recording 720p video at 30 frames per second. In addition, it includes a small front-facing camera for video chatting with an app called FaceTime.
Not everything has been improved: Apple's latest smartphone has the same amount of storage capacity as the previous one.
Status: AvailableDate Added: July 21, 2011