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| name = iPhone 4
| name = iPhone 4
| logo = [[File:IPhone 4 logo.png]]
| logo = [[File:IPhone 4 logo.png]]
| image = [[File:IPhone 4 standing.JPG|180px]]
| image = [[File:IPhone 4.JPG|200px]]
| caption =
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| developer = [[Apple Inc.]]
| developer = [[Apple Inc.]]

Revision as of 05:08, 27 June 2010

Template:IPhone dablink

iPhone 4
File:IPhone 4.JPG
DeveloperApple Inc.
ManufacturerFoxconn (OEM)[1]
TypeSlate smartphone
Release dateJune 24, 2010 (2010-06-24)[a]
Units sold1.5 million (est.)[2]
Operating systemiOS 4.0
Released June 21, 2010 (2010-06-21)
CPUApple A4 ARM Cortex-A8[3]
Memory512 MB eDRAM[4]
Storage16 GB or 32 GB flash memory
DisplayLED backlit IPS LCD
3.5-inch (diagonal) widescreen
960-by-640-pixel resolution at 326 ppi
800:1 contrast ratio
InputMulti-touch touchscreen display
3-axis gyroscope
3-axis accelerometer
Magnetometer
Proximity sensor
Ambient light sensor
CameraRear
5 MP
HD video (720p) at 30 fps
1.75 μm size pixels
5× digital zoom
LED flash
Front
VGA
SD video (480p) at 30 fps
25.17 µs size pixels
ConnectivityQuad band
GSM/EDGE/UMTS/HSDPA/HSUPA
(850, 900, 1800, 1900, 2100 MHz)
Wi-Fi (802.11b/g/n) (2.4 GHz)
Bluetooth 2.1 + EDR
PowerBuilt-in rechargeable li-ion battery
1420 mAh
Online servicesApp Store, iBook Store, iTunes Store, MobileMe
Dimensions115.2 mm (4.54 in) (h)
58.66 mm (2.309 in) (w)
9.3 mm (0.37 in) (d)
Mass137 g (4.8 oz)
PredecessoriPhone 3GS
RelatediPad, iPod Touch (Comparison)
WebsiteApple - iPhone

The iPhone 4 (Template:Pron-en, EYE-fohn-fohr) is the fourth generation of iPhone, and successor to the iPhone 3GS. Introduced on June 7, 2010 at the WWDC 2010 at the Moscone Center, San Francisco,[5] it is the first device to support FaceTime, Apple's video calling application. It has an Apple A4 processor, 512 MB of eDRAM, a 3.5 inches (89 mm) LED backlit liquid crystal display with 960-by-640 pixel resolution, and the iOS 4 operating system.

The iPhone 4 has all the features associated with an iPhone; only major changes from the iPhone 3GS are listed below. The most noticeable difference is a new industrial design. The primary structure is a stainless steel frame, which additionally acts as both antennae. The internal components of the device are situated between two panels of chemically strengthened aluminosilicate glass.[6] Additional changes include the Apple A4 processor; a high resolution display, marketed as "Retina Display"; and video conferencing capability, FaceTime.

History

See also: History of the iPhone

Release and availability

The iPhone 4 was made available for pre-order on June 15, 2010 and was released in the U.S. and four other countries on June 24: the United Kingdom, France, Germany, and Japan.[5]

Customers attempting to pre-order the iPhone 4 reported problems with the pre-order process on the U.S. and U.K. online Apple Stores which crashed due to the surge in traffic.[7] The same issue was reported with AT&T and SoftBank, who suspended advance sales of the iPhone 4 as demand threatened to exceed supply.[8] Retail stores were also unable to complete pre-order transactions due to the servers crashing.[9] Apple and its partner carriers received 600,000 pre-orders for the iPhone 4 in the first 24 hours, the largest number of pre-orders Apple has received in a single day for any device.[10] Engadget reported that at 20:30 UTC, all iPhone 4 pre-order suppliers had sold out.[11]

On June 21, Apple sent an email to their preorder customers, showing a delivery date one day early, on June 23.[12]

Issues

Shortly after iPhone 4 was delivered to customers, there were some reports that signal strength of the phone was adversely affected by holding the edge of the phone.[13] In response, Apple issued a statement advising that customers should "avoid gripping it in the lower left corner" when making or receiving a call. [14] In other words, an IPhone 4 user should not hold the phone in his/her left hand when making calls. However, the issue can be resolved otherwise by adding a case, cover or bumper to the phone. [15]

Some users also reported discoloration of the screen. Although this has been said to be a result of the glass lamination glue that was used not fully drying by the time it reaches consumers due to the speed of manufacturing. [16]

On June 24, Apple issued a statement that white models, but not black models, "have proven more challenging to manufacture than expected," and pushed the release date back to "the second half of July".[17]

Reception

The device was generally well received by critics.[18] Engadget called it "the best smartphone on the market right now".[19] CNET gave the iPhone 4 a rating of 4 out of 5 stars.[20] Walt Mossberg of The Wall Street Journal called the device "the best device in its class".[21]

Design

The iPhone 4 abandoned the rocker volume switch used on all previous models in favor of two distinct circular buttons.

The iPhone 4 features a redesigned structure, designed by Jonathan Ive. The redesign reflects the utilitarianism and uniformity of existing Apple products, such as the iPad and the iMac. The only remnant of the previous generations of iPhone is the general layout of the device; the distinctive metal structure of the iPhone 4 is more reminiscent of the 3G and 3GS. Also, the curve of the back panel as well as the band between the front and back have been decreased from a subtle curve to a flat surface. The overall dimensions of the iPhone 4 have been reduced from its predecessor. It is 4.5 inches (110 mm) high, 2.31 inches (59 mm) wide, and 0.37 inches (9.4 mm) deep, compared to the 3GS, which is 4.55 inches (116 mm) high, 2.44 inches (62 mm) wide, and 0.48 inches (12 mm) deep; it is 24% thinner than the iPhone 3GS. Steve Jobs claims that it is “the thinnest smartphone on the planet.”[22]

The iPhone 4 is structured around a stainless steel frame which acts as the primary structure for the device, and additionally acts as both the iPhone 4's antennae. The stainless steel enclosure features three slits that divide the band into three sections; the left section of band acts as the Bluetooth, Wi-Fi, and GPS antenna, and the right and lower bands sections act as the antenna for GSM and UMTS connectivity. There is some debate as to whether or not this causes issues with signal strength and availability. The act of touching the antenna with an un-gloved hand while standing on the ground potentially grounds the signal. Despite the name, the iPhone 4 is not compatible with 4G networks.

The internal components are situated between two panels of aluminosilicate glass, described by Apple as being "chemically strengthened to be 20 times stiffer and 30 times harder than plastic," theoretically allowing it to be more scratch resistant and durable than the previous generations.[6]

Hardware

See also: iPhone Hardware

Display

File:The new iPhone 4.jpg
Steve Jobs introducing the iPhone 4

The display on the iPhone 4 features a LED backlit LCD capacitive touchscreen with a pixel density of 326 pixels per inch (ppi) on a 3.5 inches (8.9 cm) (960-by-640) display, each pixel is 78 micrometers in width. The display has a contrast ratio of 800:1. The screen is marketed by Apple as the "Retina Display," based on the assertion that a display of approximately 300 ppi at a distance of 12 inches (305 mm) from one's eye is the maximum amount of detail that the human retina can process.[23] With the iPhone expected to be used at a distance of about 12 inches from the eyes, a higher resolution would allegedly have no effect on the image's apparent quality as the maximum potential of the human eye has already been met.

The display has been the subject of some controversial criticism; focused primarily on Apple's claims that the displays resolution exceeds the maximum amount of detail that the human retina can process. Raymond Soneira, president of DisplayMate Technologies, reported in an interview with Wired Magazine saying that the claims by Jobs are something of an exaggeration: "It is reasonably close to being a perfect display, but Steve pushed it a little too far". Soneira continued to state that the resolution of the retina is higher than claimed by Apple, working out to 477 ppi at 12 inches (305 mm) from the eyes.[24]

However, Phil Plait, author of Bad Astronomy, whose career includes a calibration with NASA regarding the camera on the Hubble Space Telescope, responded to the criticism by stating that "if you have [better than 20/20] eyesight, then at one foot away the iPhone 4’s pixels are resolved. The picture will look pixellated. If you have average eyesight, the picture will look just fine."[25][26]

Camera

The iPhone 4 is the first generation of iPhone to have two cameras. The LED flash for the rear-facing camera (top) and the forward-facing camera (bottom, left of speaker) are not present in older models.

The iPhone 4 features an additional front-facing VGA camera, and an improved 5 megapixel rear-facing camera integrated with an LED flash. The rear-facing camera is capable of recording HD video in 720p at 30 frames per second. Both cameras make use of the tap to focus feature, part of iOS 4, for photo and video recording.[27] The rear-facing camera has a 5X digital zoom. Previous generations did not support digital zooming, and no iPhone has optical zooming.

Gyroscope and accelerometer

The iPhone 4 introduces a gyroscopic sensor that enables 3-axis angular acceleration around the X, Y and Z axes, enabling precise calculation of yaw, pitch, and roll. The gyroscope complements the accelerometer, a sensor that has been present since the original iPhone, and detects the device's acceleration, shake, vibration shock, or fall by detecting linear acceleration along one of three axes (X, Y and Z). The combined data from the accelerometer and the gyroscope provides detailed and precise information about the device's 6-axis movement in space; the 3-axes of the gyroscope combined with the 3-axes of the accelerometer enable the device to recognize approximately how far, fast, and in which direction it has moved in space.[28]

Processor and memory

Main article: Apple A4

The iPhone 4 is powered by the Apple A4 chip, which was designed by Intrinsity and manufactured by Samsung; who have manufactured all the processors used in the previous iPhone models.[29] The A4 chip is composed of a Cortex-A8 central processing unit and a PowerVR SGX 535 graphics processor.[30] The chip is the same as in in the iPad and is able to run at up to 1 GHz.[3] All previous generations have used underclocked chips to extend battery life.

Apple has stated at a session[c] at the WWDC 2010 that the iPhone 4 will have 512 MB of RAM. The additional RAM is to support increased performance and multi-tasking.[31]

Storage and Micro-SIM

The iPhone 4 uses a Micro-SIM card, which is positioned in an ejectable tray, located on the right side of the device. All previous models have used regular Mini-SIM cards. As on previous models, all data is stored in flash memory, 16GB or 32GB, and not on the SIM. Unlike previous generations, the storage capacity is not printed on the back of the unit. The iPhone 4 continues to use the 30 pin dock connector as its only external data port.

Software

See also: iOS

As with previous iPhone models, the iPhone 4 runs on the iOS operating system developed by Apple.[32]

FaceTime

Main article: FaceTime

The iPhone 4 is the first device to support FaceTime, an embedded video conferencing application that is able to use either the front or back camera over a Wi-Fi connection to communicate with another iPhone 4.

Timeline of iPhone models

Timeline of iPhone models
iPhone 15 ProiPhone 15 ProiPhone 14 ProiPhone 14 ProiPhone 13 ProiPhone 13 ProiPhone 12 ProiPhone 12 ProiPhone 11 ProiPhone 11 ProiPhone XSiPhone XSiPhone XiPhone 15iPhone 15iPhone 14iPhone 14iPhone 13iPhone 13iPhone 12 MiniiPhone 12iPhone 11iPhone XRiPhone 8iPhone 8iPhone 7iPhone 7iPhone 6SiPhone 6SiPhone 6iPhone 6iPhone 5iPhone 5SiPhone 4SiPhone 4iPhone 3GSiPhone 3GiPhone (1st generation)iPhone SE (3rd generation)iPhone SE (2nd generation)iPhone SE (1st generation)iPhone 5C
See also: Timeline of Apple Inc. products

Source: Apple Newsroom Archive[33]

Notes

  • ^ Initial June 24, 2010 release date is only in; the United States, the United Kingdom, France, Germany, and Japan.[34]
  • ^ SIM free iPhone 4's are only available directly from Apple in; Canada, France, and the United Kingdom as of initial release.[35]
  • ^ The Advanced Performance Optimization on iOS, part 2 sesion.

References

  1. ^ Dalrymple, Jim (July 28, 2009 (2009-07-28)). "iPhone manufacturer to pay family of dead worker". CNET.com. Retrieved April 6, 2010 (2010-04-06). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  2. ^ Ogg, Erica (June 25, 2010 (2010-06-25)). "First day iPhone 4 sales estimate: 1.5 million". CNET.com. Retrieved June 26, 2010 (2010-06-26). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  3. ^ a b "iPhone 4 Teardown - Page 2". iFixit. Retrieved June 23, 2010.
  4. ^ Lane, Slash (June 17, 2010 (2010-06-17)). "Apple reveals iPhone 4 has 512MB RAM, doubling iPad". AppleInsider. Retrieved June 17, 2010 (2010-06-17). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  5. ^ a b Topolsky, Joshua (June 7, 2010 (2010-06-07)). "Steve Jobs live from WWDC 2010". Engadget. Retrieved June 18, 2010 (2010-06-18). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  6. ^ a b Diaz, Jesus (June 7, 2010 (2010-06-07)). "iPhone 4: The Definitive Guide". Gizmodo. Retrieved June 19, 2010 (2010-06-19). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  7. ^ Beaumont, Claudine (June 16, 2010 (2010-06-16)). "Apple iPhone 4: Pre-orders break records despite technical issues". The Daily Telegraph. Retrieved June 18, 2010 (2010-06-18). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  8. ^ Patel, Nilay (June 16, 2010 (2010-06-16)). "600,000 iPhone 4s pre-ordered, Apple apologizes for issues". Engadget. Retrieved June 18, 2010 (2010-06-18). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  9. ^ Murph, Darren (June 15, 2010 (2010-06-15)). "iPhone 4 pre-orderers overwhelm servers, world on the brink of ending". Engadget. Retrieved June 18, 2010 (2010-06-18). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  10. ^ "Statement by Apple on iPhone 4 Pre-Orders" (Press release). Apple Inc. June 16, 2010 (2010-06-16). Retrieved June 23, 2010 (2010-06-23). {{cite press release}}: Check date values in: |accessdate= and |date= (help)
  11. ^ Ziegler, Chris (June 15, 2010 (2010-06-15)). "AT&T sold out of iPhone 4 pre-orders for launch day". Engadget. Retrieved June 18, 2010 (2010-06-18). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  12. ^ Miller, Ross (June 22, 2010 (2010-06-22)). "iPhone 4 arriving one day early on June 23rd, says Apple email". Engadget. Retrieved June 22, 2010 (2010-06-22). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  13. ^ Chen, Jason (June 24, 2010 (2010-06-24)). "iPhone 4 Loses Reception When Holding it By Antenna Band?". Gizmodo. Retrieved June 24, 2010 (2010-06-24). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  14. ^ "Apple issues advice to avoid iPhone flaw". BBC News. Retrieved June 25, 2010.
  15. ^ {{cite web|url=http://mashable.com/2010/06/23/iphone-yellow-screen-tint/
  16. ^ Hardawar, Devindra (June 23, 2010 (2010-06-23)). "Apple iPhone 4 problems crop up: screen discoloration, reception issues". MobileBeat. Retrieved June 24, 2010 (2010-06-24). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  17. ^ "Statement by Apple on white iPhone 4". Apple. June 24, 2010 (2010-06-24). Retrieved June 25, 2010 (2010-06-25). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  18. ^ Bilton, Nick (June 23, 2010 (2010-06-23)). "iPhone 4 Reviews: The Pundits Weigh In". The New York Times. Retrieved June 25, 2010 (2010-06-25). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  19. ^ "iPhone 4 review". Engadget. June 22, 2010 (2010-06-22). Retrieved June 25, 2010 (2010-06-25). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  20. ^ "Apple iPhone 4 - 32GB - black (AT&T) Smartphone reviews". CNET.com. June 23, 2010 (2010-06-23). Retrieved June 25, 2010 (2010-06-25). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  21. ^ Mossberg, Walter (June 20, 2010 (2010-06-20)). "New iPhone Keeps Apple Top of Class". The Wall Street Journal. Retrieved June 25, 2010 (2010-06-25). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  22. ^ Helf, Miguel; Wortham, Jenna (June 7, 2010 (2010-06-07)). "On Newest iPhone, Another Camera". Gizmodo. Retrieved June 20, 2010 (2010-06-20). {{cite web}}: Check date values in: |accessdate= and |date= (help)CS1 maint: multiple names: authors list (link)
  23. ^ Brandrick, Chris (June 8, 2010 (2010-06-08)). "iPhone 4's Retina Display Explained". PC World. Retrieved June 18, 2010 (2010-06-18). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  24. ^ Hachman, Mark (June 9, 2010 (2010-06-09)). "Analyst Challenges Apple's iPhone 4 'Retina Display' Claims". PC Magazine. Retrieved June 23, 2010 (2010-06-23). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  25. ^ Plait, Phil (June 10, 2010 (2010-06-10)). "Resolving the iPhone resolution". Discover Magazine. Retrieved June 23, 2010 (2010-06-23). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  26. ^ Savov, Vlad (June 10, 2010 (2010-06-10)). "iPhone 4's retina display claim put under the math microscope". Engadget. Retrieved June 23, 2010 (2010-06-23). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  27. ^ Slivka, Eric (June 8, 2010 (2010-06-08)). "A Look at iPhone 4's Camera Quality". MacRumors. Retrieved June 20, 2010 (2010-06-20). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  28. ^ Dilger, Daniel Eran (June 16, 2010 (2010-06-16)). "Inside iPhone 4: Gyro spins Apple ahead in gaming". AppleInsider. p. 2. Retrieved June 20, 2010 (2010-06-20). {{cite web}}: Check date values in: |accessdate= and |date= (help); More than one of |pages= and |page= specified (help)
  29. ^ "Apple's new iPhone 4". TechAutos. June 15, 2010 (2010-06-15). Retrieved June 18, 2010 (2010-06-18). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  30. ^ Vance, Ashlee (February 21, 2010 (2010-02-21)). "For Chip Makers, the Next Battle Is in Smartphones". The New York Times. Retrieved June 19, 2010 (2010-06-19). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  31. ^ Kim, Arnold (June 17, 2010 (2010-06-17)). "iPhone 4 Confirmed to Have 512MB of RAM (Twice the iPad and 3GS)". MacRumors. Retrieved June 19, 2010 (2010-06-19). {{cite web}}: Check date values in: |accessdate= and |date= (help)
  32. ^ Apple Inc. "iPhone - iOS 4 is the world's most advanced mobile OS". Apple Inc. Retrieved June 25, 2010 (2010-06-25). {{cite web}}: Check date values in: |accessdate= (help)
  33. ^ Apple Inc. (2007–2023). iPhone News - Newsroom Archive. Retrieved September 12, 2023.
  34. ^ "We will ship in 5 countries" (Press release). Apple Inc. June 7, 2010 (2010-06-07). Retrieved June 21, 2010 (2010-06-21). {{cite press release}}: Check date values in: |accessdate= and |date= (help)
  35. ^ Evans, Jonny (June 15, 2010 (2010-06-15)). "Apple confirms SIM-free iPhones are truly unlocked". 9 to 5 Mac. Retrieved June 20, 2010 (2010-06-20). {{cite web}}: Check date values in: |accessdate= and |date= (help)
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