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Although it seems, identical to iPhone 3G before it with the same design in black or white plastic and the same "display with 320x480 resolution at 163 pixels per inch (though with the new" 3.5 "oleophobic oleophobic coating) - and still combines mobile phone cell phone, IPod, and Internet functionality - 3GS * iPhone has a number of important additions.

Perhaps above all, iPhone 3GS faster - "S" refers to its higher speed (up to 600 MHz to 412 MHz, the GPU has improved as well), double RAM (256 MB to 128 MB) - and adds support for faster HSDPA 7.2 Mbps (802.11g / n and Bluetooth support too), 3.0 megapixel camera - with VGA video recording at 30 frames per second - and the balance of autofocus, macro, white, and support, "Tap to focus "as well as the opportunity to reduce the start and end of the video, as well as a digital compass and a GPS.

It also includes new features, accessibility (VoiceOver), features voice control, built-in Nike + IPOD support and built-in control on the cable jack (for example, the rate of 3G Shuffle).

IPhone 3GS was released in 2009, includes 16 GB or 32 GB of memory and version, released in 2010, includes 8 GB of memory (at a lower price). Regardless of ability, Apple announced that it will offer "up to" 30 hours of audio playback and 12 hours of talk time on 2G, 5 hours of talk time on 3G, 5:00 Internet use on 3G, 9:00 of the Internet of Wi-Fi, 10 hours of video playback and up to 300 hours of standby time.

* For those who are really interested in the details, this model was presented at the June 8, 2009 iPhone 3G S (with a space between "3G" and "S"), and June 23, 2009, Apple, iPhone 3GS changed (without space).

IPhone 4, is being heralded as "the biggest leap since the original iPhone," uses all stainless steel with ultra IPS 3.5-inch, high-density LED-backlit 960x640 pixels per inch multitouch display 326 "Retina "Mobile data integrated antenna and a" metal band "that wraps around the sides of the phone, and chemically hardened glass" aluminosilcate "is on the display and a black frame and chemically tempered black glass back as well (it was introduced with the white version of the June 7, 2010, too, but this version will not be available until April 28, 2011). Regardless of color, both front and rear is facing "oleophobic" oil repellent.

equipped with two cameras - 5 megapixel high-definition video / camera (720p at 30 frames per second) with a "back-illuminated sensor", 5 x digital zoom and LED flash on the back and VGA quality video / camera on the front is designed for video over Wi-Fi with Apple, including the application "FaceTime". Has a dual microphone noise canceling, too.

And powered by "Apple A4" processor quick indefinitely has 512 MB of RAM and 8 GB, 16 GB or 32 GB of internal memory (8 GB configuration introduced 4 Oct 2011). The network includes the support networks UMTS / HSDPA / HSUPA (850, 900, 1900, 2100 MHz) and GSM / EDGE (850, 900, 1800, 1900 MHz). 802.11g / n and Bluetooth 2.1 + EDR is also supported.

Like the iPhone 3GS, which came first, the iPhone 4 also includes a digital compass, A-GPS, and accelerometer, but adds a 3-axis gyro sensor to your list of options for further 3D games.

Apple reports that the iPhone 4 offers "up to" 40 hours of audio playback, 14 hours of talk time on 2G, 7 hours of talk time on 3G, 6 hours of Internet use on 3G, 10 hours of Internet use on Wi -Fi, 10 hours of video playback and up to 300 hours standby time.

In the U.S., for new customers Wireless / qualified AT & T, 16 GB configuration was originally U.S. $ 199 and 32 GB configurations origin U.S. $ 299 with a two-year contract. On 14 June 2011, in the U.S., Apple has also started to offer this 4 unlocked iPhone in white or black for U.S. $ 649 with 16 GB of memory and $ 749 with 32 GB of memory (and stop these options 4 October 2011).

October 4, 2011, Apple introduced the lower end of configuration 8 GB for U.S. $ 99 subsidized two-year AT & T contract, and made such a configuration, available unlocked in the U.S. for U.S. $ 549 (and terminated the option 12 September 2012).

September 12, 2012, Apple dropped the price of the 8 GB iPhone 4 (GSM) model for $ 0 with a two-year contract or $ 450 unlocked and without a contract.