Apple’s iPhone was first sold in 2007. iPhone first generation began to be marketed on June 29, 2007 at a price of U.S. $ 499 for 4GB model and U.S. $ 599 for the 8GB model. The second generation iPhone 3G is named and launched in various countries at the July 11, 2008 at a price of U.S. $ 199 for the 8GB model and U.S. $ 299 for the 16GB model. Third Generation or iPhone 3GS, launched on June 17, 2009, at a price of U.S. $ 199 for the 16GB model and U.S. $ 299 for the 32GB model.
So what’s new iPhone 4 compared to the previous iPhone’s?

First, let’s surgical outer shape. The fourth-generation smart phone from Apple is much thinner than the previous iPhone form is 0.38 inches 0.5 inches while the previous iPhone. Battery life up to seven hours in an active condition, the difference of two hours from the battery version of the previous iPhone.

According to Jobs, the iPhone battery is resistant to four different events, such as speaking for seven hours in the path of 3G, as long as six hours of 3G browsing, web browsing, WiFi for 10 hours, 10 hours of video, music 40 hours and 300 hours standby. Despite the wide screen like the iPhone before, but the resolution of the iPhone 4, four times better than previous generations.
IPhone 4 bandaged body glass and stainless steel panels on the front and rear and insert the antenna which surrounds the entire body of iPhone. Phone may not have been smarter if the camera has not been immersed. In the fourth iPhone, Apple buried 5 Megapixel cameras complete with LED flash and can record and edit high-definition photo.
If earlier the iPhone operating system is a lightweight version of Mac OS X without the various components which are not necessary. The operating system used in the iPhone 4 this is IOS four and not much difference with the previous operating system. What really differs is the A4 processor that gives Apple high speed. For features that are available, some new features coming to the iPhone including multitasking, iBooks, advertising and video chat.

IPhone Specification 4

• Colors: Black or White
• Height: 4.5 inches
• Width: 2.31 inches
• Thin: 0.37 inches
• Weight: 137 grams

Capacity:

• 16GB or 32 GB

Display:Retina Display

• 3.5-inch (diagonal) widescreen Multi-Touch display
• Resolution 960 x 640 pixels, with 326 ppi
• Contrast Ratio 800:1
• Fingerprint-resistant oleophobic coating on the front and rear
• Supports multiple languages and characters simultaneously

Camera, Photo, Video:

• Footage of HD (720p) up to 30 fps
• 5MP Camera
• VGA front camera with 30 fps
• LED flash
• Geotagging feature on the photo and video

Audio:

• Frequency response: 20Hz to 20,000 Hz
• Audio Format: AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), HE-AAC, MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX +), Apple Lossless, AIFF, and WAV

TV and Video:

• Formats: H.264 video up to 720p, 30 frames per second, the Main Profile level 1.3 with AAC-LC audio up to 160 Kbps, 48 KHz, stereo audio in. M4v, Mp4, and. Mov file formats; MPEG- 4 video, up to 2.5 Mbps, 640 by 480 pixels, 30frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48KHz, stereo audio in. m4v,. mp4, and. mov file formats; Motion JPEG (M-JPEG format) up to 35 Mbps, 720 by 1280 pixels, 30frames per second, PCM stereo audio in. avi file format
• Supports resolution of 1024 × 768 pixels, with a dock connector to VGA for 576p and 480p.

Cellular and Wireless:

• UMTS / HSDPA / HSUPA (850, 900, 1900, 2100 MHz)
• GSM / EDGE (850, 900, 1800, 1900 MHz)
• 802.11b/g/n Wi-Fi (802.11n 2.4GHz)
• Bluetooth 2.1 + EDR wireless technology

Feature Location

• A-GPS
• Digital Compass
• Wi-Fi

Batteries and Power:

• Battery lithium-ion battery that can be in charge
• Power USB via PC / Mac
• Talk time up to 7 hrs (3G), up to 14 hours (2G)
• Standby Time: 300 hours
• Use of the Internet up to 6 hours (3G), up to 10 hours (WiFi)
• Video Recording: up to 10 hours
• Audio Recording: up to 40 hours