IPhone 4

iPhone 4
Black iPhone 4
iPhone 4 (GSM model) in black
DeveloperApple Inc.
ManufacturerFoxconn (UMTS/GSM model)
Pegatron (CDMA model)[1]
Slogan"This changes everything. Again."
Generation4th
ModelA1332 (GSM model)
A1349 (CDMA model)[2]
First releasedGSM model (black): June 24, 2010 (June 24, 2010)[a]
CDMA model (black): February 10, 2011 (February 10, 2011)[a]
GSM and CDMA models (white): April 28, 2011 (April 28, 2011)[a]
DiscontinuedSeptember 10, 2013 (2013-09-10)
PredecessoriPhone 3GS
SuccessoriPhone 4S
RelatediPod Touch (4th generation)
TypeSmartphone
Form factorSlate
Dimensions115.2 mm (4.54 in) H
58.6 mm (2.31 in) W
9.3 mm (0.37 in) D
Mass137 g (4.8 oz)
Operating systemOriginal: iOS 4.0 (GSM model), iOS 4.2.5 (CDMA model)
Last: iOS 7.1.2, released June 30, 2014 (2014-06-30)
System-on-chipApple A4[3]
CPU1 GHz (Underclocked to 800 MHz) single core 32-bit ARM Cortex-A8
GPUPowerVR SGX535[3]
Memory512 MB LPDDR DRAM[4]
Storage8, 16, or 32 GB flash memory
Battery3.7 V, 5.3 Wh (1,420 mAh) Lithium-ion battery[5]
Display3.5 in (89 mm) diagonal 3:2 aspect ratio widescreen
LED backlit IPS TFT LCD
960×640 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
SoundSingle loudspeaker
3.5 mm TRRS, frequency response: 20 Hz to 20 kHz
Rear camera5 MP back-side illuminated sensor
HD video (720p) at 30 frame/s
1.75 μm size pixels
digital zoom
4 element lens
LED flash
Photo and video geotagging
Front camera0.3 MP VGA (480p) at 30 frame/s

Tap to focus video or still images
Photo and video geotagging
ConnectivityWi-Fi (802.11 b/g/n) (2.4 GHz only)
Bluetooth 2.1 + EDR
GSM model: quad-band GSM/GPRS/EDGE
(800, 850, 900, 1,800, 1,900 MHz)
Quad-band UMTS/HSDPA/HSUPA
(800, 850, 900, 1,900, 2,100 MHz) (800 MHz is not yet officially supported by Apple)
CDMA model: dual-band CDMA/EV-DO Rev. A (800, 1,900 MHz)
Data inputsMulti-touch touchscreen display
Dual microphone
3-axis gyroscope
3-axis accelerometer
Digital compass
Proximity sensor
Ambient light sensor
SARModel A1332 Head: 1.17 W/kg
Body: 1.11 W/kg[6]
Model A1349 Head: 1.18 W/kg
Body: 0.87 W/kg[7]
Hearing aid compatibilityGSM
3G 850/1,900 MHz M4, T4
2G 850 MHz M3, T3
2G 1,900 MHz M2, T3
CDMA M4, T4
WebsiteApple – iPhone 4 – Video calls, multitasking, HD Video, and more at the Wayback Machine (archived October 14, 2010)
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The iPhone 4 is a smartphone that was designed and marketed by Apple Inc. It is the fourth generation of the iPhone lineup, succeeding the iPhone 3GS and preceding the 4S. Following a number of notable leaks, the iPhone 4 was first unveiled on June 7, 2010, at Apple's Worldwide Developers Conference in San Francisco,[9] and was released on June 24, 2010, in the United States, United Kingdom, France, Germany, and Japan. The iPhone 4 introduced a new hardware design to the iPhone family, which Apple's CEO Steve Jobs touted as the thinnest smartphone in the world at the time; it consisted of a stainless steel frame which doubled as an antenna, with internal components situated between two panels of aluminosilicate glass.[10] The iPhone 4 introduced Apple's new high-resolution "Retina Display" (with a pixel density of 326 pixels per inch), while maintaining the same physical size and aspect ratio as its precursors, Apple's A4 system-on-chip, along with iOS 4—which notably introduced multitasking functionality and app folders. It was the first iPhone at the time to include a front-facing camera, which made possible Apple's new FaceTime video chat service, and the first to be released in a version for CDMA networks, ending AT&T's period as the exclusive carrier of iPhone products in the United States.

The iPhone 4 received a largely positive reception, with critics praising its revamped design and more powerful hardware, in comparison to previous models. While it was a market success (with over 600,000 pre-orders within 24 hours), the release of the iPhone 4 was plagued by highly publicized reports concerning abnormalities in its new antenna design that caused the device to lose its cellular signal if held in a certain way. Most direct contact with the phone's outer edge would cause a significant decrease in signal strength. Apple released iOS 4.0.1 to try to fix these issues, but were unsuccessful.[11]

The iPhone 4 spent the longest time as Apple's flagship iPhone model at fifteen months. Although the succeeding 4S was announced in October 2011, the 4 continued to be sold as a midrange model until September 2012, and thereafter as the entry-level offering in Apple's lineup until September 2013 with the announcement of the iPhone 5S and iPhone 5C. The iPhone 4 had one of the longest lifespans of any iPhone ever produced, spanning close to four years and available in some developing countries until early 2015.

  1. ^ Chen, Yenting (January 13, 2011). "CDMA iPhone to contribute strong sales to Foxconn and Pegatron in 2011". DigiTimes. Archived from the original on January 15, 2011. Retrieved January 14, 2011.
  2. ^ Identifying iPhone models – support.apple.com Archived September 24, 2011, at the Wayback Machine Retrieved September 21, 2011.
  3. ^ a b "iPhone 4 Teardown". iFixit. p. 2. Archived from the original on June 26, 2010. Retrieved June 23, 2010.
  4. ^ Lane, Slash (June 17, 2010). "Apple reveals iPhone 4 has 512 MB RAM, doubling iPad". AppleInsider. Archived from the original on June 26, 2010. Retrieved June 17, 2010.
  5. ^ "iPhone 4 Teardown". iFixit. June 23, 2010. p. 1. Archived from the original on June 28, 2010. Retrieved July 18, 2010.
  6. ^ "iPhone 4 RF Exposure Information (Model A1332)". Archived from the original on November 9, 2017. Retrieved November 9, 2017.
  7. ^ "iPhone 4 RF Exposure Information (Model A1349)". Archived from the original on November 9, 2017. Retrieved November 9, 2017.
  8. ^ iPhone, iPad, and iPod Touch Secrets – edepot.com Archived December 8, 2012, at archive.today Retrieved September 21, 2011.
  9. ^ Topolsky, Joshua (June 7, 2010). "Steve Jobs live from WWDC 2010". Engadget. Archived from the original on October 22, 2019. Retrieved June 18, 2010.
  10. ^ Cite error: The named reference Definitive Guide was invoked but never defined (see the help page).
  11. ^ "Apple releases iOS 4.0.1 with new iPhone signal formula". Macworld. July 15, 2010. Archived from the original on May 27, 2020. Retrieved May 19, 2020.

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