The Apple iPhone 4 has a design that really sets it apart from the competition. Its slim design is even thinner than the iPhone 3GS. The iPhone 4 measures 9.3mm deep while the iPhone 3GS measures 12.3 mm deep, making it about 24% less in size. The iPhone 4 measures 59mm to 62mm side to side, making it narrower than the 3GS as well. Although the weight is the same at 136g, the changes in the iPhone 4’s dimensions make it less bulky than the 3GS.

All of these aesthetic changes in design are welcome, but the improvements found in the Apple iPhone 4 don’t end there. It’s what is found inside the phone that really illustrates the technological improvements. The Apple iPhone 4 possesses a 3.5-inch display just like the 3GS. It is the improved resolution of the 960 x 640 pixel, IPS display that distinguishes the iPhone 4. The 326 pixels per inch create the highest resolution ever found on a phone.

The new ‘Retina’ display, so called because it is made up of more of pixels than the human retina can process, significantly improves the sharpness and clarity of images. The phone’s screen also uses the same in-plane switching (IPS) techniques as are used on the screens you will find on iMacs and iPads. Consequently, not only is the display bright and colorful, it has a massive viewing angle, meaning that it looks great no matter which way you hold it or which angle you are looking at it from.

The Apple iPhone 4 contains the company’s A4 CPU. This is the same processor found in the Apple iPad. Running on the iOS 4 operating system, a number of capabilities are available to the Apple iPhone 4. The recently renamed iOS 4 provides the long-awaited multitasking function. Just as with the welcome and long awaited copy and paste feature, Apple has come through by making the multitasking feature operate without a hitch.

Size advancements and the addition of multitasking are not the only achievements of the iPhone 4. Advancements in camera and video recording devices are also a welcome improvement. The camera found on the back has changed from 3 megapixels to a more robust 5 megapixels with the same size pixel. An LED flash and a backlit sensor augment the camera. It also comes with and integrated 5X zoom. Video can now be shot in high definition at 720p and 30 frames per second. Additionally, the tap-to-focus feature found on the camera is now available on the video recorder.

Anyone who owns an iPhone or iPhone 3G should consider the iPhone 4 a must own. Including design changes that are pleasing to the eye, the iPhone 4 has made technological advances that improve its performance as well as its imaging capabilities. These changes make it a noticeable upgrade to previous incarnations of the iPhone.

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