Ibad blogs: APPLE I PHONE4

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,^[6] 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.^[7] 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".

The latest operating system release is iOS 4.3.3 (for GSM) and 4.2.8 (for CDMA).

iPhone 4

Apple iPhone 4 (black UMTS/GSM model)
Developer	Apple Inc.
Manufacturer	Foxconn (UMTS/GSM model) Pegatron (CDMA model)^[1]
Slogan	This changes everything. Again.^[2]
Form factor	Slate bar
Generation	4
Release date	GSM model (black): June 24, 2010^[a] CDMA model (black): February 10, 2011^[a] GSM and CDMA models (white): April 28, 2011
Operating system	iOS 4.3.3 (build 8J2) (GSM) Released May 4, 2011; 2 months ago iOS 4.2.8 (build 8E401) (CDMA) Released May 4, 2011; 2 months ago
Power	Built-in rechargeable Li-ion battery 3.7 V at 1420 mAh^[3]
CPU	Apple A4 (ARM Cortex-A8)^[4]
GPU	Apple A4 (PowerVR SGX 535)^[4]
Storage capacity	16 GB or 32 GB flash memory
Memory	512 MB eDRAM^[5]
Display	3.5-inch (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 fps 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 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
Related articles	iPad, iPod Touch (comparison)