IPhone 4

iPhone 4
	iPhone 4 (GSM model) in black
Developer	Apple Inc.
Manufacturers	Foxconn (UMTS/GSM model); Pegatron (CDMA model)
Type	Smartphone
Generation	4th
First released	GSM model (black): June 24, 2010[a] ; CDMA model (black): February 10, 2011[a] ; GSM and CDMA models (white): April 28, 2011[a] ; 8 GB models: October 4, 2011[a]
Discontinued	September 10, 2013
Predecessor	iPhone 3GS
Successor	iPhone 4S
Related	iPod Touch (4th generation)
Form factor	Slate
Dimensions	115.2 mm (4.54 in) H; 58.6 mm (2.31 in) W; 9.3 mm (0.37 in) D
Weight	137 g (4.8 oz)
Operating system	Original: iOS 4.0 (GSM model), iOS 5.0 (8 GB model), iOS 4.2.10 (CDMA model); Last: iOS 7.1.2, released June 30, 2014
System-on-chip	Apple A4
CPU	1 GHz (Underclocked to 800 MHz) single core 32-bit ARM Cortex-A8
GPU	PowerVR SGX535
Memory	512 MB LPDDR DRAM
Storage	8, 16, or 32 GB flash memory
Battery	3.7 V, 5.3 Wh (1,420 mAh) Lithium-ion battery
Rear camera	5 MP back-side illuminated sensor ; HD video (720p) at 30 frame/s ; 1.75 μm size pixels ; 5× digital zoom ; 4 element lens ; LED flash ; Photo and video geotagging
Front camera	0.3 MP VGA (480p) at 30 frame/s ; ; Tap to focus video or still images ; Photo and video geotagging
Display	3.5 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
Sound	Single loudspeaker ; 3.5 mm TRRS, frequency response: 20 Hz to 20 kHz
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, 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 inputs	Multi-touch touchscreen display ; Dual microphone ; 3-axis gyroscope ; 3-axis accelerometer ; Digital compass ; Proximity sensor ; Ambient light sensor
Model	A1332 (GSM model or 8 GB model); A1349 (CDMA model)
Website	Apple – 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 developed and marketed by Apple Inc. It is the fourth generation of the iPhone lineup, succeeding the iPhone 3GS and preceding the iPhone 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,^[7] 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.^[8] 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.^[9]

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.

^ 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.
^ ^a ^b "iPhone 4 Teardown". iFixit. p. 2. Archived from the original on June 26, 2010. Retrieved June 23, 2010.
^ 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.
^ Galan, Walter; et al. (June 23, 2010). "iPhone 4 Teardown". iFixit. p. 1. Archived from the original on June 28, 2010. Retrieved July 18, 2010.
^ Identifying iPhone models – support.apple.com Archived September 24, 2011, at the Wayback Machine Retrieved September 21, 2011.
^ iPhone, iPad, and iPod Touch Secrets – edepot.com Archived December 8, 2012, at archive.today Retrieved September 21, 2011.
^ Topolsky, Joshua (June 7, 2010). "Steve Jobs live from WWDC 2010". Engadget. Archived from the original on October 22, 2019. Retrieved June 18, 2010.
^ Cite error: The named reference Definitive Guide was invoked but never defined (see the help page).
^ Chartier, David (July 15, 2010). "Apple releases iOS 4.0.1 with new iPhone signal formula". Macworld. Archived from the original on May 27, 2020. Retrieved May 19, 2020.

[DT_manufacturer_1-1] 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.

[A4_Clock_Speed-2] "iPhone 4 Teardown". iFixit. p. 2. Archived from the original on June 26, 2010. Retrieved June 23, 2010.

[ifixit_memory_1-3] 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.

[ifixit_battery_1-4] Galan, Walter; et al. (June 23, 2010). "iPhone 4 Teardown". iFixit. p. 1. Archived from the original on June 28, 2010. Retrieved July 18, 2010.

[apple_model_ID_1-5] Identifying iPhone models – support.apple.com Archived September 24, 2011, at the Wayback Machine Retrieved September 21, 2011.

[edepot_parts_1-6] Phone, iPad, and iPod Touch Secrets – edepot.com Archived December 8, 2012, at archive.today Retrieved September 21, 2011.

[Live_WWDC_2010_–_Engadget-7] Topolsky, Joshua (June 7, 2010). "Steve Jobs live from WWDC 2010". Engadget. Archived from the original on October 22, 2019. Retrieved June 18, 2010.

[Definitive_Guide-8] Cite error: The named reference Definitive Guide was invoked but never defined (see the help page).

[9] Chartier, David (July 15, 2010). "Apple releases iOS 4.0.1 with new iPhone signal formula". Macworld. Archived from the original on May 27, 2020. Retrieved May 19, 2020.

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