iPhone 4

Design
iPhone 4 uses IPS LCD technology of the screens and use the LEDs on the screen. The technology is better known as the "Retina Display". iPhone 4 still uses a 3.5 "with an extraordinary level of resolution (640x960) pixels. The screen is also capable of showing 16 million colors are vivid. The screen also has the highest pixel density is very good and makes the iPhone screen 4 to display the best detail. Viewpoint of the screen is also very good so the screen can be seen from any side. Its dimension is 115.2 x 58.6 x 9.3 mm with weight is 137 gram.
 Apple decided to make all the buttons on the iPhone 4 to be tenderer than the previous iPhone. On the left, there are buttons for volume adjustment and switch vibrate mode. At the top, the iPhone 4 has a 3.5mm headset jack and power button. While on the right side, you will find a slot micro SIMcard. At the bottom, you'll find the speakers and Apple's port connection. At the rear, there is a 5 megapixel autofocus camera with LED flash. In the front there is a 0.3 megapixel camera for video calls.

Operating System
iPhone 4 already using IOS 4 from Apple. In the latest IOS, there are a few additions like the ability to add wallpaper to the home page menu, multi-tasking, add a folder that can be filled with 9 applications. The menu page can look more presentable. In IOS 4, the display interfaces changing. Everything looks sharper and more interesting than the IOS 3.
 Interface feels very light when used. The movement of the menu page, when launching the application, and any movement that occurred was very subtle. 4 IOS has a lot of progress compared to the previous three. For texting, IOS 4 is able to make corrections on the wrong article. If we are wrong type, it will display a red line under the posts we are wrong.
 
Multimedia
iPhone 4 using a 5 megapixel autofocus camera with LED flash. iPhone 4 does not have a camera shortcut keys so you have to access it via the menu. But the camera of the iPhone 4 has excellent ability. The camera comes with a light sensor on the lens so it can adjust the light level when you do shoot. The camera produces images with good detail and colors that exactly match the original. LED flash also works well. Front camera can also be used to capture your self. Although image quality is not good, you can count on him to look in the mirror occasionally. IPhone 4 camera is capable of capturing video at 720p HD quality (1280x720) pixels with 30fps. IPhone 4 is very surprising ability because does not feel lagging when playing back the video.
There is no much change in the music player on the iPhone IOS 4 4. Music player is equipped with increasingly fine coverflow interface during use. Although there is not much change, the music player is still very pleasant to use. And there is the addition of quality on the iPhone speaker 4. The voice sounded louder and sharper than the iPhone-the iPhone before.

Internet and Connectivity
iPhone 4 uses a quad-band (850/900/1800/1900MHz) GSM to gain access to HSDPA 7.2 Mbps, HSUPA 5.6 Mbps. In addition, the iPhone 4 has Bluetooth 2.1 that will not only connect you to a wireless headset, but also on the Bluetooth keyboard also, thanks to IOS 4. Finally, 802.11n Wi-Fi connectivity on board is offer a faster alternative data.
Web browsing experience is still the same as in the IOS 3, very few innovations in the Safari browser. The Safari browser is not equipped with Flash features. But with the capabilities of the Safari browser, the videos can still be played properly in a browser. The browser can be used very comfortably. At a high resolution screen, it adds comfort while doing web browsing. The writings and pictures look very detailed. iPhone 4 provides a highly optimized browsing experience.