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Tuesday 5 April 2011

IPhone 4



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, 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 the Moscone 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 A4 processor 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".
The latest operating system release is iOS 4.3.

Developer Apple Inc.
Manufacturer Foxconn (UMTS/GSM model)
Pegatron (CDMA model)
Slogan This changes everything. Again.
Form factor Capacitive Touchscreen smartphone
Generation 4
Release date GSM model: 24 June 2010
CDMA model: 10 February 2011
Operating system iOS 4.3.1 (build 8G4) (GSM)
Released March 25, 2011; 10 days ago
iOS 4.2.6 (build 8E200) (CDMA)
Released February 10, 2011; 53 days ago
Power Built-in rechargeable Li-ion battery
3.7 V at 1420 mAh
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-inch (89 mm) diagonal 1.5:1 aspect ratio widescreen
LED backlit IPS TFT LCD Retina display
640x960 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 fps
1.75 μm size pixels
5× digital zoom
Tap to focus video or still images
LED flash
Photo and video geotagging
Front camera .3 MP (VGA)
SD video (480p) at 30 fps
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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