Compared to all the other smartphones on the market right now, nothing beats the iPhone 4. Its new design is even almost a quarter thinner than the previous model, the iPhone 3GS, and narrower to boot, meaning it will take up less space in your pocket. Though they weigh about the same, at 136 grams, the overall dimensions make it a sleeker phone than previous models in the line.

While these enhancements alone are enough to justify upgrading to the Apple iPhone 4, they have thrown in even more convenient features for the discerning customer. After all, the iPhone 4, while being smaller, shares the iPhone 3GS’ same 3.5″ screen, but now it can carry an even higher 960 x 640 pixel resolution. Each inch carries 326 pixels, making it the highest resolution phone screen you can find on the market today.

The Retina display is far better than any other type of smartphone screen you can find on the market - after all, it gets its name from the fact that it has a greater number of pixels than can be picked up by the human eye. iPads and iMacs have also carried over their in-plane-switching techniques to the screen of the iPhone 4, making the screen able to be viewed from more angles than ever before and allowing for maximum visibility and comfort - no more tilting the screen so you can see what is going on.

The A4 CPU included with the iPhone 4 is the same one that powers the iPad. What’s more the iPhone 4 has a greater number of capabilities with the new iOS 4 operating system, including the ability to more easily multitask. While you may think that they took too long to do it, Apple merely wanted to bide their time until they could release a finished product, as with the copy and past features.

The iPhone 4 also made significant improvements on its still and motion photography capabilities. Apple has included a high definition video camera that can shoot thirty frames per second at 720p. The user also has the tap-to-focus ability with the video recorder that Apple previously issued only with its still-image camera. The improved camera can now shoot images up to five mega-pixels (compared with three in the 3GS) with the same amount of pixels. In addition, the iPhone 4’s camera now comes with a backlit sensor, an integrated LED flash, and 5X zoom feature.

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