iphone 4G

The iPhone 4 is a touchscreen smartphone developed by Apple. It is the fourth generation of iPhone, and successor to the iPhone 3GS. It is particularly marketed for video calling (marketed by Apple as FaceTime), consumption of media such as books and periodicals, movies, music, and games, and for general web and e-mail access. It was announced on June 7, 2010, at the WWDC 2010 held at theMoscone Center, San Francisco,and was released on June 24, 2010, in the United States, the United Kingdom, France, Germany and Japan.

The iPhone 4 runs Apple's iOS operating system, the same operating system as used on previous iPhones, the iPad, and the iPod Touch. It is primarily controlled by a user's fingertips on the multi-touch display, which is sensitive to fingertip contact.

The most noticeable difference between the iPhone 4 and its predecessors is the new design, which incorporates an uninsulated stainless steel frame that acts as the device's antenna. The internal components of the device are situated between two panels of chemically strengthened aluminosilicate glass. It has an Apple A4processor and 512 MB of eDRAM, twice that of its predecessor and four times that of the original iPhone. Its 3.5-inch (89 mm) LED backlit liquid crystal display with a 960×640 pixel resolution is marketed as the "Retina Display".

Developer 

Apple Inc.

Manufacturer 

Foxconn (UMTS/GSM model)

Pegatron (CDMA model)

Slogan

This changes everything. Again.

Form factor

Slate bar

Generation

4

Release date 

GSM model (black): June 24, 2010

CDMA model (black): February 10, 2011

GSM and CDMA models (white): April 28, 2011

Operating system 

iOS 4.3.5 (build 8L1) (GSM)

Released July 25, 2011; 18 days ago

iOS 4.2.10 (build 8E600) (CDMA)

Released July 25, 2011; 18 days ago

Power

Built-in rechargeable Li-ion battery

3.7 V at 1420 mA

CPU

Apple A4 (ARM Cortex-A8)

GPU 

Apple A4 (PowerVR SGX 535)

Storage capacity 

16 GB or 32 GB flash memory

Memory

512 MB eDRAM

Display

3.5 inches (89 mm) diagonal 1.5:1 aspect ratio widescreen

LED backlit IPS TFT LCD Retina display

640×960 resolution at 326 ppi (0.61 Megapixels)

800:1 contrast ratio (typical)

500 cd/m2 max brightness (typical)

Fingerprint-resistant oleophobic coating on front and back glass

Audio

Single loudspeaker

3.5 mm TRRS

Frequency response: 20 Hz to 20 kHz

Input 

Multi-touch touchscreen display

Push-buttons

Dual microphone

3-axis gyroscope

3-axis accelerometer

Digital compass

Proximity sensor

Ambient light sensor

Rear camera 

5 MP back-side illuminated sensor

HD video (720p) at 30 frame/s

1.75 μm size pixels

5× digital zoom

Tap to focus video or still images

LED flash

Photo and video geotagging

Front camera

0.3 MP (VGA)

SD video (480p) at 30 frame/s

25.17 μm size pixels

Tap to focus video or still images

Photo and video geotagging

Connectivity 

Wi-Fi (802.11 b/g/n) (2.4 GHz only)

Bluetooth 2.1 + EDR

GSM model: Quad-band GSM/GPRS/EDGE

(800 850 900 1800 1900 MHz)

Quad-band UMTS/HSDPA/HSUPA

(800 850 900 1900 2100 MHz) (800 MHz not yet announced as supported by Apple)

CDMA model: Dual-band CDMA/EV-DO Rev. A (800 1900 MHz)

Hearing aid compatibility

GSM

3G 850/1900 MHz M4, T4

2G 850 MHz M3, T3

2G 1900 MHz M2, T3

CDMA M4, T4

Online services

App Store, iTunes Store, iBookstore,MobileMe

Dimensions 

115.2 mm (4.54 in) (h)

58.66 mm (2.309 in) (w)

9.3 mm (0.37 in) (d)

Weight 

137 g (4.8 oz)

Predecessor

iPhone 3GS

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