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{{Lower case title}}
{{Use mdy dates|date=October 2013}}
{{Infobox mobile phone
| name = iPhone 4
| logo = IPhone 4 logo.svg
| logosize = 150
| image = IPhone 4 Mock No Shadow PSD.png
| imagesize = 170
| alt = Black iPhone 4
| caption = A Black Apple iPhone 4 (black UMTS/GSM model)
| developer = [[Apple Inc.]]
| manufacturer = [[Foxconn]] (UMTS/GSM model)<br /> [[Pegatron]] (CDMA model)<ref name="DT manufacturer 1">{{cite web|last=Chen|first=Yenting|title=CDMA iPhone to contribute strong sales to Foxconn and Pegatron in 2011|url=http://www.digitimes.com/news/a20110112PD216.html|publisher=[[DigiTimes]]|accessdate=January 14, 2011|date=January 13, 2011}}</ref>
| type = [[Smartphone]]
| form = [[Bar phone|Bar]]
| modelnumber = A1332 (GSM model)<br />A1349 (CDMA model)<ref name="apple model ID 1">[http://support.apple.com/kb/HT3939 Identifying iPhone models – support.apple.com] Retrieved September 21, 2011.</ref>
| partnumber = 16 GB: MC318, MC603<br />32 GB: MC319, MC605<ref name="edepot parts 1">[http://www.edepot.com/iphone.html#iPhone_Part_Number iPhone, iPad, and iPod Touch Secrets – edepot.com] Retrieved September 21, 2011.</ref>
| releasedate = '''GSM model (black):''' June 24, 2010{{Ref label|A|a|none}}  <br />'''CDMA model (black):'''  February 10, 2011{{Ref label|A|a|none}} <br />'''GSM and CDMA models (white):''' April 28, 2011
| available =
| price = <!-- this is the price at initial release on non-contract in native country, i.e. United States of America, not the current price -->
| status = Discontinued (except for [[BRICS]], under sale and only 8G version)<ref>[http://store.apple.com/cn/buy-iphone/iphone4 iPhone 4 page (Apple China)]</ref>
| unitssold = <!-- Per talk page, Apple press releases report only combined 3GS and 4 sales; can not be used as a ref. in this field. -->
| unitsshipped =
| media =
| os = '''Original:''' [[iOS 4|iOS 4.0]]<br />'''Current:''' [[iOS 7|iOS 7.0.4]], released {{release date|mf=yes|2013|10|22}}
| battery = 3.7&nbsp;V, 5.3&nbsp;Wh (1,420&nbsp;mAh)<ref name="ifixit battery 1">{{cite web|title=iPhone 4 Teardown|url=http://www.ifixit.com/Teardown/iPhone-4-Teardown/3130/1|publisher=[[iFixit]]|accessdate=July 18, 2010|page=1|page=4|date=June 23, 2010}}</ref>
| soc = [[Apple A4]]<ref name="A4 Clock Speed">{{cite web|title=iPhone 4 Teardown|url=http://www.ifixit.com/Teardown/iPhone-4-Teardown/3130/2|publisher=[[iFixit]]|page=2|page=4|accessdate=June 23, 2010}}</ref>
| cpu = [[ARM Cortex-A8]]
| gpu = [[PowerVR]] SGX 535<ref name="A4 Clock Speed"/>
| storage = 8, 16, or 32 [[gigabyte|GB]] [[flash memory]]
| memory = 512 [[megabyte|MB]] [[DRAM]]<ref name="ifixit memory 1">{{cite web|title=Apple reveals iPhone 4 has 512MB RAM, doubling iPad|url=http://www.ifixit.com/Teardown/iPhone-4-Teardown/3130/1|publisher=[[AppleInsider]]|last=Lane|first=Slash|accessdate=June 17, 2010|date=June 17, 2010}}</ref>
| display = {{convert|3.5|in|mm|abbr=on}} diagonal 1.5:1 aspect ratio widescreen <br /> [[LED backlit]] [[TFT LCD#In-plane switching|IPS TFT LCD]]<br /> 960×640 [[image resolution|resolution]] at 326 [[pixel density|ppi]] (0.61 megapixels)<br /> 800:1 [[contrast ratio]] (typical) <br /> 500 [[luminance|cd/m<sup>2</sup>]] max brightness (typical) <br /> [[Fingerprint]]-resistant [[lipophobicity|oleophobic]] [[coating]] on front and back glass
| sound = Single [[loudspeaker]] <br /> 3.5 mm [[TRS connector|TRRS]], [[frequency response]]: 20 [[Hertz|Hz]] to 20 [[kilo-|k]]Hz
| input = [[Multi-touch]] [[touchscreen]] display <br /> Push-buttons <br /> Dual [[microphone]] <br /> 3-axis [[gyroscope]] <br /> 3-axis [[accelerometer]] <br /> [[Digital data|Digital]] [[magnetometer|compass]] <br /> [[Proximity sensor]] <br /> [[photodetector|Ambient light]] sensor
| rear_camera = 5 [[megapixel|MP]] [[backside illumination|back-side illuminated sensor]] <br /> [[high-definition video|HD video]] ([[720p]]) at 30 [[frame rate|frame/s]] <br /> 1.75 [[micrometre|μm]] size pixels <br /> 5× [[digital zoom]] <br /> Tap to focus video or still images <br /> [[light-emitting diode|LED]] [[flash (photography)|flash]] <br /> Photo and video [[geotagging]]
| front_camera = 0.3 MP [[Video Graphics Array|VGA]] ([[480p]]) at 30 frame/s <br />25 μm size pixels <br /> Tap to focus video or still images <br /> Photo and video geotagging
| connectivity =  [[Wi-Fi]] ([[IEEE 802.11|802.11]] [[IEEE 802.11b-1999|b]]/[[IEEE 802.11g-2003|g]]/[[IEEE 802.11n-2009|n]]) {{nowrap|(2.4 [[Hertz|GHz]] only)}} <br /> [[Bluetooth#Bluetooth v2.1 + EDR|Bluetooth 2.1 + EDR]]<br />
'''GSM model:''' [[multi-band|quad-band]] [[GSM]]/[[General Packet Radio Service|GPRS]]/[[Enhanced Data Rates for GSM Evolution|EDGE]] <br /> ([[GSM frequency bands|800, 850, 900, 1,800, 1,900]]&nbsp;[[Hertz|MHz]])<br /> Quad-band [[Universal Mobile Telecommunications System|UMTS]]/[[High-Speed Downlink Packet Access|HSDPA]]/[[High-Speed Uplink Packet Access|HSUPA]] <br /> ([[UMTS frequency bands|800, 850, 900, 1,900, 2,100]]&nbsp;MHz) (800 MHz is not yet officially supported by Apple)<br />
'''CDMA model:''' [[multi-band|dual-band]] [[code division multiple access|CDMA]]/[[EV-DO Rev. A]] (800, 1,900&nbsp;MHz)
| discontinued  = {{End date|2013|09|10}}
| dimensions = {{convert|115.2|mm|in|abbr=on}} H<br />{{convert|58.6|mm|in|abbr=on}} W<br />{{convert|9.3|mm|in|abbr=on}} D
| weight = {{convert|137|g|oz|abbr=on}}
| predecessor = [[iPhone 3GS]]
| successor = [[iPhone 4S]]
| related = [[iPad]], [[iPod Touch]] ([[list of iOS devices|comparison]])
| hac = '''GSM''' <br / > ''3G 850/1,900&nbsp;MHz'' M4, T4 <br /> ''2G 850&nbsp;MHz'' M3, T3 <br /> ''2G 1,900&nbsp;MHz'' M2, T3 <br /> '''CDMA''' M4, T4
| website = {{URL|www.apple.com/iphone}}
}}
{{IPhone models}}
 
The '''iPhone 4''' is an [[iOS]] [[smartphone]] developed by [[Apple Inc.]] Following a number of notable leaks, the iPhone 4 was first unveiled on June 7, 2010 at Apple's [[Apple Worldwide Developers Conference|Worldwide Developers Conference]] in [[San Francisco]].<ref name="Live WWDC 2010 – Engadget">{{cite web|last=Topolsky|first=Joshua|title=Steve Jobs live from WWDC 2010|url=http://www.engadget.com/2010/06/07/steve-jobs-live-from-wwdc-2010|publisher=[[Engadget]]|accessdate=18 June 2010|date=7 June 2010}}</ref> 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 line, incorporating an uninsulated stainless steel frame which doubles as an antenna, with internal components situated between chemically strengthened [[aluminosilicate]] glass. With these changes, Apple claimed that the iPhone 4 was the thinnest smartphone in the world.<ref name = "Definitive Guide"/> The iPhone 4 also introduced Apple's new [[Retina Display]] technology; while maintaining the same physical size and [[display resolution]] as its precursors, its [[liquid crystal display]] had a [[pixel density]] of 326 pixels per inch, which Apple's CEO [[Steve Jobs]] claimed was higher than what a human's [[retina]] could distinguish at an average distance. The iPhone 4 also introduced Apple's [[Apple A4|A4]] [[system-on-chip]], along with [[iOS 4]]—which notably introduced multitasking functionality and Apple's new [[FaceTime]] [[Videotelephony|video chat]] service. The iPhone 4 was also the first iPhone to be released in a version for [[CDMA]] networks.
 
The iPhone 4 received generally positive reception, with critics praising its revamped design and more powerful hardware in comparison to previous models; however, the launch of the iPhone 4 was plagued by highly publicized reports that abnormalities in its antenna design caused the device to lose its cellular signal if held in a certain way.
 
==History==
{{Further2|[[History of the iPhone]]}}
 
===Prototypes===
<!--Legal note: This section originally developed at [[iPhone]] and was moved to [[History of the iPhone]] before placement here -->
Before the official unveiling of the iPhone 4 on June 7, 2010, two [[prototype]]s were brought to the attention of the media, breaching Apple's normally secretive development process. Many of the speculations regarding technical specifications proved accurate.
 
====Gizmodo leak====
On April 19, 2010, gadget website [[Gizmodo]] reported that they had purchased an iPhone prototype for $5000, and furthermore, had conducted a [[product teardown]] of the device. The prototype is reported to have been lost by an Apple employee, Gray Powell, in [[Redwood City, California]].<ref name="gizmodo leak 1">{{cite web|last=Golijan|first=Rosa|title=The Tale of Apple's Next iPhone|url=http://gizmodo.com/5520471/the-tale-of-apples-next-iphone|publisher=[[Gawker Media]]|work=[[Gizmodo]]|accessdate=June 18, 2010|date=April 23, 2010}}</ref> Shortly after Gizmodo published detailed information about the prototype, Apple's legal associates formally requested for the phone to be returned to Apple, and Gizmodo responded with the intent to cooperate.<ref name="gizmodo leak 2">{{cite web|url=http://gizmodo.com/5520479/a-letter-apple-wants-its-secret-iphone-back|title=A Letter: Apple Wants Its Secret iPhone Back|first=Brian|last=Lam|date= April 19, 2010|publisher=[[Gawker Media]]|work=[[Gizmodo]]|accessdate=June 18, 2010}}</ref>
 
On April 22, officers from the Rapid Enforcement Allied Computer Team (REACT) task force of the California [[High Technology Theft Apprehension and Prosecution Program|HTTAP Program]] raided the home of Jason Chen, the Gizmodo editor responsible for reviewing the prototype, seizing all of his computers and hard drives.<ref name="cnet gizmodo reaction 1">{{cite web|url=http://news.cnet.com/8301-13579_3-20003446-37.html|title=Police seize Gizmodo's computers in iPhone probe|author=Sandoval, Greg; McCullagh, Declan|date=April 26, 2010|publisher=[[Gawker Media]]|work=[[Gizmodo]]|accessdate=June 18, 2010}}</ref> The [[Electronic Frontier Foundation]] criticized the raid as violating journalist source protection laws that forbid the seizure of journalist computers as well as the suspicion that Apple had used its influence as a member of the steering committee which is charged with direction and oversight of the California REACT task force to push police into action in a way that would not normally be conducted for this type of incident. Apple had already received the iPhone prototype before the raid when it was returned by Gizmodo.<ref name="eff gizmodo warrant 1">{{cite web| url = http://www.eff.org/deeplinks/2010/04/gizmodo-search-warrant-illegal| title = OverREACTing: Dissecting the Gizmodo Warrant| first = Matt| last = Zimmerman| date=April 27, 2010|publisher=[[Electronic Frontier Foundation]]|accessdate=June 18, 2010}}</ref> The [[District Attorney]] has stated that the investigation has been suspended, and discontinued searching through the Gizmodo editor's belongings as they determine whether the shield laws are applicable, and cautioned that no charges have been issued at this point.<ref name="wired finder regret 1">{{cite web|url=http://www.wired.com/threatlevel/2010/04/iphone-finder|title=iPhone Finder Regrets His 'Mistake'|author=Chen, Brian; Kim Zetter|date=April 29, 2010|publisher=[[Wired (magazine)|Wired]]|accessdate={{Start date|2010-06-18}}}}</ref><ref name="NYT apple's response 1">{{cite news|url=http://www.nytimes.com/2010/05/03/business/media/03carr.html|title=A Lost iPhone Shows Apple's Churlish Side|first=David|last=Carr|date=May 2, 2010|work=[[The New York Times]]|accessdate=June 18, 2010}}</ref>
 
====Taoviet leak====
Pictures and video of a second prototype were published on a Vietnamese website, Taoviet, on May 12, 2010.<ref name="mercury leak 1">{{cite web|url=http://www.mercurynews.com/ci_15072831?source%253Dmost_viewed.20F88DA3D7D369F5BB70F372987EAE1F.html&nclick_check=1|title=Another next-generation iPhone surfaces, this one in Vietnam|first=Troy|last=Wolverton|date=May 13, 2010|publisher=[[San Jose Mercury News|Mercury News]]|accessdate=June 18, 2010}}</ref> It was almost identical to the first, and used an A4 chip manufactured by Apple.<ref name="gizmodo new leak 1">{{cite web|url=http://gizmodo.com/5536912/another-lost-iphone-4-shows-new-details|title=Another Lost iPhone 4 Shows New Details|first=Jesus|last=Diaz|date=May 12, 2010|publisher=[[Gawker Media]]|work=[[Gizmodo]]|accessdate=June 18, 2010}}</ref> The website purchased the prototype for $4,000.<ref name="engadget vietnam leak 1">{{cite web|url=http://www.engadget.com/2010/05/12/next-generation-iphone-escapes-in-vietnam|title=Next generation iPhone unscrewed from Vietnam|first=Thomas|last=Ricker|date=May 12, 2010|publisher=Engadget|accessdate=June 18, 2010}}</ref> [[DigiTimes]] reported that the screen resolution of the new phone was 960-by-640, which was confirmed by Apple at the iPhone 4's official announcement.
 
===Release===
The iPhone 4 was made available for pre-order on June 15, 2010. Customers attempting to pre-order the iPhone 4 reported problems with the pre-order process on the US and UK online [[Apple Store (online)|Apple Stores]] which [[crash (computing)#Website server crashes|crashed]] due to the surge in traffic.<ref name="telegraph recordbraking orders 1">{{cite news|last=Beaumont|first=Claudine|title=Apple iPhone 4: Pre-orders break records despite technical issues|url=http://www.telegraph.co.uk/technology/apple/7833362/Apple-iPhone-4-Pre-orders-break-records-despite-technical-issues.html|accessdate=July 18, 2010|newspaper=[[The Daily Telegraph]]|date=June 16, 2010|location=London}}</ref> The same issue was reported with [[AT&T Mobility|AT&T]] and [[SoftBank]], Apple's exclusive partners in the United States and Japan respectively, who suspended advance sales of the iPhone 4 as demand threatened to exceed supply.<ref name="engadget order issues 1">{{cite web|last=Patel|first=Nilay|title=600,000 iPhone 4s pre-ordered, Apple apologizes for issues|url=http://www.engadget.com/2010/06/16/600-000-iphone-4s-pre-ordered-apple-apologizes-for-issues|publisher=Engadget|accessdate=July 18, 2010|date=June 16, 2010}}</ref> Retail stores were also unable to complete pre-order transactions due to the servers crashing.<ref name="engadget overwhelming orders 1">{{cite web|last=Murph|first=Darren|title=iPhone 4 pre-orderers overwhelm servers, world on the brink of ending|url=http://www.engadget.com/2010/06/15/iphone-4-pre-orderers-overwhelm-servers-world-on-the-brink-of-e|publisher=Engadget|accessdate=July 18, 2010|date=June 5, 2010}}</ref>
 
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 had received in a single day for any device up to that point.<ref name="apple pre-orders notice 1">{{cite press release|title=Statement by Apple on iPhone 4 Pre-Orders|url=http://www.apple.com/pr/library/2010/06/16iphone.html|publisher=[[Apple Inc.]]|accessdate=June 23, 2010|date=June 16, 2010}}</ref> ''[[Engadget]]'' reported that at 20:30 [[Coordinated Universal Time|UTC]], all iPhone 4 pre-order suppliers had sold out.<ref name="engadget att sold-out 1">{{cite web|last=Ziegler|first=Chris|title=AT&T sold out of iPhone 4 pre-orders for launch day|url=http://www.engadget.com/2010/06/15/atandt-sold-out-of-iphone-4-for-launch-day|publisher=Engadget|accessdate=July 18, 2010|date=June 15, 2010}}</ref> 1.7&nbsp;million iPhone 4s were sold in its first three days of availability.<ref name="apple iP4 sales 1">{{cite press release|title=iPhone 4 Sales Top 1.7&nbsp;million|url=http://www.apple.com/pr/library/2010/06/28iphone.html|publisher=[[Apple Inc.]]|accessdate=July 18, 2010|date=June 28, 2010}}</ref>
 
The iPhone 4 has also been released through [[Orange (telecommunications)|Orange]] in Tunisia and was available in eight cities at the launch.<ref name="orange tunisia release 1">{{cite web|url=http://iphone.orange.tn/outrouveriphone-orange.html|title=Outrouver iPhone|publisher=Orange Tunisia|date=|accessdate=}}</ref> On July 30, 2010, iPhone 4 was made available for sale in Australia, New Zealand and 15 other countries with free bumper cases.<ref name="nzherald iP4 launches 1">{{cite news|url=http://www.nzherald.co.nz/technology/news/article.cfm?c_id=5&objectid=10662184|title=iPhone 4 launches in NZ|publisher=NZ Herald|date=|accessdate=}}</ref><ref name="vodaphone nz iP4 launces 1">{{cite web|url=http://www.vodafone.co.nz/iphone4|title=iPhone 4|publisher=Vodaphone NZ|date=|accessdate=}}</ref> In South Korea, it was released by [[KT (telecommunication company)|KT]] on September 10. In Israel, it was released, too, on September 24, through [[Cellcom (Israel)|Cellcom]], [[Pelephone]] and [[Partner Communications Company|Orange]]. It was launched in Thailand on September 23 by AIS, DTAC and True Move, and in Malaysia on September 26 in Kuala Lumpur, and nationwide on September 27 according to the website of [[Maxis Communications|Maxis]].
 
The iPhone 4 was released in South Africa on September 22 on the [[Vodacom]] and [[MTN Group|MTN]] networks, in very limited quantities.<ref name="fin24 iP4 limited release 1">{{cite web|url=http://www.fin24.com/Business/iPhone-4-arrives-in-SA-20100920|publisher=Fin24|title=iPhone 4 arrives in SA|date=|accessdate=}}</ref> The iPhone 4 was launched in Vietnam on September 30 on VinaPhone and Viettel, at first in 3 major cities: [[Hanoi]], [[Ho Chi Minh city]] and [[Da Nang]], and then all over the country by the end of October.<ref name="vinaphone iP4 releases 1">{{cite web|url=http://iphone.vinaphone.com.vn|title=iPhone release|publisher=Vinaphone|date=|accessdate=}}</ref><ref name="vietteltelecom iP4 releases 1">{{cite web|url=http://iphone.vietteltelecom.vn|title=iPhone release|publisher=Viettel Telecom|date=|accessdate=}}</ref>
 
The iPhone 4 was launched in India on May 27, 2011 by [[Aircel]] and [[Bharti Airtel|Airtel]].<ref name="PCW aircel india release 1">{{cite web|url=http://www.pcworld.in/news/apple-iphone-4-be-launched-may-27-aircel-airtel-49622011|title=Apple iPhone 4 To Be Launched on May 27 By Aircel, Airtel|work=PCWorld|publisher=IDG Media Private Ltd|date=May 25, 2011|accessdate=August 30, 2011}}</ref>
 
On January 11, 2011, [[Verizon Wireless]] announced during a media event that it had reached an agreement with Apple and would begin selling a [[CDMA]] iPhone 4 in the United States, ending Apple's exclusivity agreement with AT&T. The Verizon iPhone went on sale on February 10 and pre orders began on February 3.<ref name="wp verizon iP4 release 1">{{cite news|url=http://voices.washingtonpost.com/fasterforward/2011/01/liveblog_the_verizon_iphone.html|work=The Washington Post|title=Liveblog: The Verizon iPhone|date=|accessdate=}}</ref><ref name="npr verizon iP4 release 1">{{cite web|last=Memmott|first=Mark|url=http://www.npr.org/blogs/thetwo-way/2011/01/11/132833078/its-official-verizon-has-iphone-4|title=It's Official: Verizon Has The iPhone 4: The Two-Way|publisher=NPR|date=January 11, 2011|accessdate=August 30, 2011}}</ref><ref name="wsj verizon iP4 release 1">{{cite news|url=http://online.wsj.com/article/SB10001424052748703791904576075681886276172.html|work=The Wall Street Journal|first=Shayndi|last=Raice|title=Verizon Unwraps iPhone|date=January 12, 2011}}</ref> The Verizon iPhone includes the 'Personal Hotspot" feature which allows a user to use the iPhone as a wireless [[hotspot (Wi-Fi)|hotspot]], with up to five devices connecting at one time. The February 3, 2011, presale of the iPhone 4 broke Verizon's first day sales records for a single device.<ref name="vsw verizon iP4 record 1">{{cite press release|title=Verizon Wireless Has Record Sales On First Day Of iPhone 4|url=http://news.vzw.com/news/2011/02/pr2011-02-04.html|publisher=[[Verizon Wireless]]|accessdate=February 4, 2011|date=February 4, 2011}}</ref>
 
On June 24, 2010, Apple issued a statement that the white iPhone 4 models were proving more "challenging to manufacture" than expected, and initially pushed the release date back to the second half of July. There was a lot of speculation surrounding the delay of the white iPhone 4. Among the most popular rumors are those concerning the phone's internal camera being adversely affected by light leaking in due to the semi-translucent glass and the white paint. Other sources report that the problem relates to Apple's inability to match the white color of the front face plate with that of the home button.<ref name="cnet white iP4 delay 1">{{cite web|url=http://news.cnet.com/8301-31021_3-20020819-260.html|title=White iPhone 4 delayed until spring|publisher=CNET|date=|accessdate=August 30, 2011}}</ref>{{Failed verification|reason=I don't think a reference that states that the claim was heard from a friend counts as a reliable source.|date-December 2013|date=December 2013}} On April 27, 2011, Apple announced that it would be releasing the white iPhone 4 model on April 28, 2011, for both GSM and CDMA.<ref name="ars technica white iP4 release att 1">{{cite web|last=Cheng|first=Jacqui|title=Finally: white iPhone 4 arrives April 28 on AT&T and Verizon|url=http://arstechnica.com/apple/news/2011/04/finally-white-iphone-4-arrives-april-28-on-att-and-verizon.ars|publisher=[[Ars Technica]]|accessdate=April 27, 2011|date=April 27, 2011}}</ref> The release of the white iPhone 4 was carried out on April 28.<ref name="apple white iP4 release 1">{{cite web|title=White iPhone 4 currently available for purchase|url=http://store.apple.com/us/browse/home/shop_iphone/family/iphone?mco=MTAyNTQzMjI|accessdate=May 21, 2011|date=May 21, 2011}}</ref><ref name="verizon white iP4 release 1">{{cite web|title=iPhone 4, now available in white|url=http://www.verizonwireless.com/iphone.shtml|accessdate=September 16, 2011|date=September 16, 2011}}</ref>
 
During Apple's official unveiling of the [[iPhone 4S]] on October 4, 2011, it was announced that [[Sprint Nextel|Sprint]] would begin carrying the reconfigured CDMA iPhone 4 and the iPhone 4S in the US on October 14.<ref name="laptopmag sprint iP4S release 1">{{cite web|url=http://blog.laptopmag.com/199-iphone-4s-vs-99-iphone-4-whats-the-better-deal|title=$199 iPhone 4S vs. $99 iPhone 4: What's the Better Deal?|publisher=LaptopMag|date=October 5, 2011|accessdate=October 5, 2011}}</ref><ref name="australian iP4S release 1">{{cite web|url=http://www.theaustralian.com.au/australian-it/apple-unveils-theiphone-4s-at-event-at-cupertino/story-e6frgakx-1226158624667|title=Apple unveils the iPhone 4S at event at Cupertino|publisher=AustralianIT|date=October 5, 2011|accessdate=October 5, 2011}}</ref>
 
=== Discontinuation ===
 
In September 2013, after the release of the [[iPhone 5S]] and [[iPhone 5C]], Apple stopped selling the iPhone 4 online and in their stores.<ref>{{Cite web|url = http://live.cnet.com/Event/CNETs_Apple_Sept_10_event_live_blog?Page=15|title = CNET's Apple Sept. 10 event live blog|date = September 10, 2013|accessdate = September 10, 2013|publisher = CBS Interactive|website = [[CNet]]|last = }}</ref>
 
[[File:Steve Jobs Headshot 2010-CROP.jpg|thumb|right| Former [[Apple Inc.|Apple]] CEO, [[Steve Jobs]], holding a white iPhone 4. The white iPhone 4 was released in April 2011.]]
 
==Hardware==
{{See also|iPhone#Hardware|l1=iPhone Hardware}}
 
===Display===
{{See also|Retina display}}
The display of the iPhone 4 is manufactured by [[LG Display|LG]] under an exclusive contract with Apple. It features an [[LED backlit]] [[liquid crystal display|TFT LCD]] [[capacitive touchscreen|capacitive]] [[touchscreen]] with a pixel density of 326 [[pixel density|pixels per inch]] (ppi) on a {{convert|3.5|in|cm|abbr=on}} (diagonally measured), 960×640 display. Each pixel is 78 [[micrometer]]s 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 {{convert|305|mm|inch|0}} from one's eye, or 57 [[arcsecond]]s per pixel<ref name="arctan sum 1"><math>\arctan\big(\tfrac{1/300}{12}\big)</math></ref> is the maximum amount of detail that the human [[retina]] can perceive.<ref name="PCW display explained 1">{{cite web|url=http://www.pcworld.com/article/198201/iphone_4s_retina_display_explained.html|title=iPhone 4's Retina Display Explained|first=Chris|last=Brandrick|date=June 8, 2010|publisher=[[PC World (magazine)|PC World]]|accessdate=June 18, 2010}}</ref> With the iPhone expected to be used at a distance of about 12&nbsp;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.
 
This claim has been disputed. Raymond Soneira, president of DisplayMate Technologies, said in an interview with [[Wired (magazine)|''Wired'' magazine]], 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 stated that the resolution of the human retina is higher than claimed by Apple, working out to 477 ppi at {{convert|12|inch|mm|0}} from the eyes, or 36 arcseconds per pixel.<ref name="PCW display challenge 1">{{cite web|url=http://www.pcmag.com/article2/0,2817,2364871,00.asp|title=Analyst Challenges Apple's iPhone 4 'Retina Display' Claims|first=Mark|last=Hachman|date=June 9, 2010|work=[[PC Magazine]]|accessdate=June 23, 2010}}</ref>
 
However, [[Phil Plait]], author of ''[[Bad Astronomy]]'', whose career includes a collaboration 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".<ref name="discovermag display non-issue 1">{{cite web|url=http://blogs.discovermagazine.com/badastronomy/2010/06/10/resolving-the-iphone-resolution|title=Resolving the iPhone resolution|first=Phil|last=Plait|authorlink=Phil Plait|date=June 10, 2010|publisher=[[Discover (magazine)|Discover Magazine]]|accessdate=June 23, 2010}}</ref><ref name="engadget display explained 1">{{cite web|url=http://www.engadget.com/2010/06/10/iphone-4s-retina-display-claim-put-under-the-math-microscope|title=iPhone 4's retina display claim put under the math microscope|first=Vlad|last=Savov|date=June 10, 2010|publisher=Engadget|accessdate=June 23, 2010}}</ref>
 
===Camera===
[[File:IPhone 4 cameras.png|thumb|The iPhone 4 is the first iPhone [[list of iOS devices#iPhone|model]] 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 a backside-illuminated 5 [[megapixel]] rear-facing camera with a 3.85&nbsp;mm f/2.8 lens<ref name="ars technica iP4 camer 1">{{cite web|url=http://arstechnica.com/apple/news/2010/06/sizing-up-the-iphone-4-for-shutterbugs.ars|title=Sizing up the iPhone 4 for shutterbugs|publisher=[[Ars Technica]]|date=|accessdate=}}</ref>[http://pocketnow.com/iphone/iphone-5-first-test-photo] and an [[LED flashlight|LED]] flash. The rear-facing camera is capable of recording [[high-definition video|HD video]] in [[720p]] at 30 [[frame rate|frames per second]]. Both cameras make use of the ''tap to focus'' feature, part of iOS 4, for photo and video recording.<ref name="macrumors iP4 camer quality 1">{{cite web|url=http://www.macrumors.com/2010/06/08/a-look-at-iphone-4s-camera-quality|title=A Look at iPhone 4's Camera Quality|first=Eric|last=Slivka|date=June 8, 2010|publisher=[[MacRumors]]|accessdate=June 20, 2010}}</ref> The rear-facing camera has a 5× [[digital zoom]].<!--only photos or video too?-->
 
===Connectivity===
In contrast to Steve Jobs' announcement at WWDC 2010, recent [[Federal Communications Commission]] documentation has shown that the iPhone 4 contains a [[multi-band|penta-band]] [[3G]] [[Universal Mobile Telecommunications System|UMTS]] antenna, not a quad-band 3G UMTS radio, as advertised by Apple. According to the [[Federal Communications Commission|FCC]] documentation filed by Apple, the radio inside the iPhone 4 supports 800, 850, 900, 1,900, and 2,100&nbsp;MHz. The 800&nbsp;MHz frequency, which is most commonly used in Japanese mobile phones, is not advertised as being supported by Apple.<ref name="engadget iP4 bands 1">{{cite web|url=http://www.engadget.com/2010/06/07/iphone-4-hits-fcc-becomes-worlds-second-announced-pentaband-3g/2|title=iPhone 4 hits FCC, becomes world's second announced pentaband 3G phone|first=Vlad|last=Savov|date=June 7, 2010|publisher=Engadget|accessdate=July 25, 2010|archiveurl=http://archive.is/6GJL|archivedate=July 30, 2012}}</ref> However, the 800&nbsp;MHz band is a subset of the 850&nbsp;MHz band, which probably explains why the device is advertised as quad-band.{{Citation needed|date=November 2010}} The chip-sets were manufactured by [[Skyworks Solutions]]<ref name="chipworks iP4 teardown 1">{{cite web|url=http://www.chipworks.com/en/technical-competitive-analysis/resources/recent-teardowns/2010/06/silicon-teardown-of-the-apple-iphone-4-smart-phone|title=Teardown of the Apple iPhone 4 Smart Phone » Recent Teardowns|publisher=Chipworks|date=June 23, 2010|accessdate=August 30, 2011}}</ref> and [[Infineon]] for GSM version.
 
As with most of Apple's mobile products, the iPhone 4 also uses the [[Dock Connector#Apple 30 pin dock connector|30 pin dock connector]] as its only external data port.
 
The iPhone 4 is the first generation of iPhone to have a second [[Noise-canceling microphone|microphone]] used for [[noise cancellation]]. It is located on the top of the unit near the headphone jack; the main microphone is on the bottom left.<ref name="apple iP4 phone features 1">{{cite web|url=http://www.apple.com/iphone/features/phone.html|title=iPhone 4 – Learn about phone and voicemail features|publisher=Apple|date=|accessdate=August 30, 2011}}</ref>
 
===Gyroscope and accelerometer===
The iPhone 4 introduces a [[Vibrating structure gyroscope|gyroscopic sensor]] that detects 3-axis angular acceleration around the [[Cartesian coordinate system|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 [[iPhone (original)|original iPhone]], which 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.<ref name="appleinsider iP4 gyro gaming 1">{{cite web|url=http://www.appleinsider.com/articles/10/06/16/inside_iphone_4_gyro_spins_apple_ahead_in_gaming.html&page=2|title=Inside iPhone 4: Gyro spins Apple ahead in gaming|first=Daniel Eran|last=Dilger|date=June 16, 2010|publisher=[[AppleInsider]]|page=2|accessdate=June 20, 2010}}</ref>
 
===Processor and memory===
The iPhone 4 is powered by the [[Apple A4]] chip, which was designed by [[Intrinsity]]<ref name="anandtech intrinsity 1">{{cite web|last=Garnesh|first=T S|title=Apple's Intrinsity Acquisition: Winners and Losers|url=http://www.anandtech.com/show/3665/apples-intrinsity-acquisition-winners-and-losers|publisher=AnandTech|accessdate=July 17, 2012}}</ref>  and, like all prior iPhone models, manufactured by [[Samsung Group|Samsung]].<ref name="PCW iP4 display explained 1">{{cite web|url=http://www.pcworld.com/article/198201/iphone_4s_retina_display_explained.html|title=Apple's new iPhone 4|date=June 15, 2010|publisher=TechAutos|accessdate=June 18, 2010}}</ref> This [[system-on-a-chip]] is composed of an [[ARM architecture|ARM Cortex-A8]] [[central processing unit|CPU]] integrated with a [[PowerVR|PowerVR SGX 535]] [[graphics processing unit|GPU]].<ref name="NYT CPU battle 1">{{cite news|url=http://www.nytimes.com/2010/02/22/technology/22chip.html|title=For Chip Makers, the Next Battle Is in Smartphones with better technology|first=Ashlee|last=Vance|date=February 21, 2010|work=The New York Times|accessdate=June 19, 2010}}</ref> The Apple A4 is also used in the [[iPad]] where it is clocked at its rated speed of 1&nbsp;[[GHz]]. The clock speed in the iPhone 4 has not been disclosed. All prior [[list of iOS devices#iPhone|models]] of the iPhone have [[underclock]]ed the CPU, which typically extends battery life and lowers [[CPU power dissipation|heat dissipation]].
 
The iPhone 4 has 512 MB of [[DRAM]]. The additional DRAM supports increased performance and multi-tasking.<ref name="ifixit iP4 RAM 1">{{cite web|url=http://www.ifixit.com/Teardown/iPhone-4-Teardown/3130/1|title=iPhone 4 Confirmed to Have 512MB of RAM (Twice the iPad and 3GS)|first=Arnold|last=Kim|date=June 17, 2010|publisher=[[MacRumors]]|accessdate=June 19, 2010}}</ref>
 
===Storage and Micro-SIM===
The iPhone 4 uses a [[Subscriber Identity Module#micro-SIM|Micro-SIM card]] on iPhone 4 devices running on a GSM network, which is positioned in an ejectable tray, located on the right side of the device. On a CDMA network, however, the phone connects to the network using an [[Electronic Serial Number|ESN]]. All prior models have used regular [[Subscriber Identity Module#mini-SIM|Mini-SIM]] cards. Depending on the operator, Micro-SIM cards may not be available for all networks globally. As a technical workaround it is possible to trim a Mini-SIM card with a knife or scissors so that it fits into the Micro-SIM tray.<ref name="wired iP4 microsim 1">{{cite web|url=http://www.wired.com/gadgetlab/2010/05/sim-trim-cutting-card-down-to-microsim-size|title=Trimming a sim to micro-sim size|first=Charlie|last=Sorrel|date=May 6, 2010|publisher=[[Wired (magazine)|Wired]]|accessdate=November 24, 2011}}</ref>
 
As on prior models, all data is stored in [[flash memory]], 8, 16 or 32&nbsp;GB, and not on the SIM. Unlike prior generations, the storage capacity is not printed on the back of the unit.
 
==Design==
[[File:IPhone 4 Black.jpg|thumb|The iPhone 4 is constructed of glass faces and a metal rim.]]
The iPhone 4 features a redesigned structure, designed by [[Jonathan Ive]]. Most notably, the bulges of the back panel as well as the band between the front and back are gone and have been replaced with flattened surfaces. The redesign reflects the [[Utilitarianism (architecture)|utilitarianism]] and uniformity of existing Apple products, such as the [[iPad]] and the [[iMac]]. The overall dimensions of the iPhone 4 have been reduced from its predecessor.<ref name="Helf, Miguel">{{cite news|title=On Newest iPhone, Another Camera|url=http://www.nytimes.com/2010/06/08/technology/08apple.html?scp=7&sq=iPhone%204&st=cse|accessdate=July 18, 2010|newspaper=[[The New York Times]]|date=June 7, 2010|author=Helf, Miguel|author2=Wortham, Jenna}}</ref>
 
It is {{convert|115|mm|inch}} high, {{convert|59|mm|inch}} wide, and {{convert|9.4|mm|inch}} deep, compared to the iPhone 3GS, which is {{convert|116|mm|inch}} high, {{convert|62|mm|inch}} wide, and {{convert|12|mm|inch}} deep; making the iPhone 4.24% thinner than its predecessor, the [[iPhone 3GS]]. [[Steve Jobs]] claimed it to be "the thinnest smartphone on the planet".<ref name="Helf, Miguel"/> The reduced size of the device is primarily due to the externally placed antenna.
 
The iPhone 4 is structured around a [[stainless steel]] frame that wraps around the edge of the phone, acting both as the primary structure for the device and as the iPhone 4's antennas. This metal band features two slits on the [[GSM]] version of the phone, one at the lower left, and one at the top (and a fake slit along the lower right, to cosmetically mirror the one at the lower left) that divide the band into two antenna sections: the left section of the band serves as the [[Bluetooth]], [[Wi-Fi]], and [[Global Positioning System|GPS]] antenna, and the right and lower sections of the band act as the antenna for GSM and [[Universal Mobile Telecommunications System|UMTS]] connectivity.
 
On the CDMA version of the phone there are four slits in the metal band. Two at the top (on the left and right) and two at the bottom. This divides the metal band into four different segments, which like the GSM version of the phone, serves as different antennas for connectivity. The top portion of the band (divided by the top left and right slits) is for connecting to the [[CDMA]] network. The left portion of the metal band is for Bluetooth, Wi-Fi, and GPS just like the GSM version. The right side is not an antenna, but serves to cosmetically mirror the left side and also to create a similar look to the GSM version of the phone.
 
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 prior models.<ref name="Definitive Guide">{{cite web|last=Diaz|first=Jesus|title=iPhone 4: The Definitive Guide|url=http://gizmodo.com/5557101/iphone-4-the-definitive-guide|publisher=[[Gizmodo]]|accessdate=June 19, 2010|date=June 7, 2010}}</ref>
 
In fall 2010, [[pentalobular screw]]s started to replace the Philips screws used in post-repair units in the US and in production units in Japan.<ref name="reuters iP4 screws 1">{{cite news|url=http://www.reuters.com/article/idUSLNE70K02T20110121?loomia_ow=t0:s0:a49:g43:r2:c0.137380:b41167378:z0|title=Apple tightens the screw on iPhone 4|agency=Reuters|accessdate=January 21, 2011|date=January 21, 2011|location=San Francisco, California|first=Gabriel|last=Madway}}</ref>
 
==Software==
{{See also|iOS|iOS version history}}
 
The iPhone 4 shipped with [[iOS 4]], which was the newest version of Apple's [[iOS]] [[mobile operating system]]. iOS 4 introduced a multitasking system, allowing apps to remain "suspended" in memory, perform certain operations in the background, and allowing users to switch between apps using an on-screen menu.<ref name="PCWorld1-multitasking">{{cite web|last=Perenson|first=Melissa|title=Multitasking on Apple's iPhone 4: How Does It Work?|url=http://www.techhive.com/article/198296/iphone_4_multitasking.html|work=PC World|accessdate=April 14, 2013|date=June 8, 2010}}</ref> It also introduced [[FaceTime]], which allows users to perform video calls between other iPhone, [[iPad]], and [[OS X]] users.
 
The iPhone 4 supports the most recent release of iOS, [[iOS 7]], as released in September 2013. However, certain visual effects (such as the use of blurred translucency, and the [[parallax]] effect on the home screen), live camera filters, and [[AirDrop]] are disabled on the iPhone 4 due to performance concerns.<ref name=ars-ios7-iphone4>{{cite web|title=New lease on life or death sentence? iOS 7 on the iPhone 4|url=http://arstechnica.com/apple/2013/09/new-lease-on-life-or-death-sentence-ios-7-on-the-iphone-4/|work=Ars Technica|accessdate=22 December 2013}}</ref>
 
==Accessories==
 
===Bumper===
[[File:Apple iPhone 4 Bumper.jpg|thumb|An iPhone 4 next to a Bumper.]]
An iPhone 4 Bumper is a ring of rubber and plastic that surrounds the edge of the iPhone 4, with the purpose of protecting the phone. The inner part is rubber with the external band made of plastic. The Bumper wraps around the edges of the device protecting the edges, and to a lesser extent, the screen. The Bumper does not cover the front or rear of the phone, though it does slightly raise the iPhone off whatever surface it is sitting on.<ref name="iPhone 4 Bumper review">{{cite web|url=http://www.pcadvisor.co.uk/reviews/pc-peripheral/3232155/apple-iphone-4-bumper-review|title=Apple iPhone 4 Bumper review|first=Mark|last=Hattersley|date=July 16, 2010|work=[[PC Advisor (magazine)|PC Advisor]]|publisher=[[IDG]]|location=United Kingdom|language=[[British English]]|archiveurl=http://www.webcitation.org/5yLHCznOW|archivedate=April 30, 2011|accessdate=April 30, 2011}}</ref>
 
Additionally, the plastic band houses metallic buttons for the volume controls and sleep/wake button. The six holes in the Bumper enable access to the mute switch, dock connector, headphone jack, speaker, and microphones.<ref name="iPhone 4 Bumper review"/>
 
Apple updated the bumper with a wider volume switch hole with the release of iPhone 4 for CDMA network. The updated bumper is also compatible with [[iPhone 4S]], the next generation iPhone that have the identical exterior design and measurements as iPhone 4 CDMA.
 
==Reception==
 
===Pre-release===
Pre-release reception generally positive.<ref name="NYT review 1">{{cite news|url=http://bits.blogs.nytimes.com/2010/06/23/iphone-4-reviews-the-pundits-weigh-in|title=iPhone 4 Reviews: The Pundits Weigh In|first=Nick|last=Bilton|work=The New York Times|date=June 23, 2010|accessdate=June 25, 2010}}</ref> The announcement included information that had not been covered by Gizmodo. [[Fox News Channel|Fox News]] commented that "seeing it in action is far more informative than staring at Gizmodo's photos of a busted test unit".<ref name="fox q+a 1">{{cite news|url=http://www.foxnews.com/scitech/2010/06/08/apple-iphone-questions-answered|title=Your iPhone 4 Questions Answered|first=Harry|last=McCracken|publisher=[[Fox News Channel|Fox News]]|date=June 8, 2010|accessdate=July 13, 2010}}</ref> [[Rhodri Marsden]] of [[The Independent]] said that "aside from the introduction of face-to-face video calling, it's not a staggering feature set," instead focusing on how the device is "more powerful than its predecessor, speedier, easier to use and will make previously laborious tasks seem like a cinch".<ref name="indie more powerful 1">{{cite news|url=http://www.independent.co.uk/life-style/gadgets-and-tech/features/rhodri-marsden-you-might-not-like-it-but--jobs-has-set-the-pace-1994092.html|title=You might not like it, but Jobs has set the pace|first=Rhodri|last=Marsden|authorlink=Rhodri Marsden|work=The Independent|location=UK|date=June 8, 2010|accessdate=July 13, 2010|location=London}}</ref>
 
[[CNET]] reacted to the announcement by explaining how it believes that [[iMovie#iMovie for iOS|iMovie for iOS]] was the "most exciting part of this year's WWDC Keynote". The article noted how the iPhone 4, unlike current cameras, can record HD content and then edit it from the same device, labeling it a "true mobile editing suite".<ref name="cnet future filmmaking 1">{{cite web|url=http://reviews.cnet.com/8301-19512_7-20007040-233.html|title=iMovie for iPhone 4 and the future of filmmaking|first=Joe|last=Aimonetti|publisher=[[CNET]]|date=June 8, 2010|accessdate=July 13, 2010}}</ref>
 
===Reviews===
Reviews of the iPhone 4 have been generally favorable. [[Walt Mossberg]] of ''[[The Wall Street Journal]]'' called the device "the best device in its class".<ref name="wsj top class phone 1">{{cite news|url=http://online.wsj.com/article/SB10001424052748704853404575322951290405346.html|title=New iPhone Keeps Apple Top of Class|first=Walter|last=Mossberg|authorlink=Walter Mossberg|work=The Wall Street Journal|date=June 20, 2010|accessdate=June 25, 2010}}</ref> [[Engadget]] named it the "best smartphone on the market" in June 2010.<ref name = "Engadget iPhone 4 review">{{cite web|url=http://www.engadget.com/2010/06/22/iphone-4-review|title=iPhone 4 review|first=Joshua|last=Topolsky|authorlink=Joshua Ryan|publisher=Engadget|date=June 22, 2010|accessdate=July 13, 2010}}</ref> [[CNET]] gave the iPhone 4 a rating of 8.6 out of 10, one of the highest ratings it has given any smartphone.<ref name="cnet iP4 review 1">{{cite web|url=http://reviews.cnet.com/smartphones/apple-iphone-4-32gb/4505-6452_7-34117595.html|title=Apple iPhone 4 – 32GB – black (AT&T) Smartphone reviews|publisher=[[CNET]]|date=June 23, 2010|accessdate=June 25, 2010}}</ref> [[TechRadar]] gave the device 4.5/5 stars.<ref name="TR iP4 review 1">{{cite web|url=http://www.techradar.com/reviews/phones/mobile-phones/apple-iphone-4-694980/review?artc_pg=15|title=Apple iPhone 4 review|publisher=[[TechRadar]]|date=June 25, 2010|accessdate=June 25, 2010}}</ref> Consumer Reports said the signal problem was the reason they did not rate it a "recommended" model, although the other tests ranked it highest among smart phones.<ref name="consumerreports1"/>
 
[[Joshua Ryan|Joshua Topolsky]] of [[Engadget]] described the device's industrial design as being "more detailed and sophisticated" than its predecessor.<ref name = "Engadget iPhone 4 review"/>
 
=== Technical problems ===
Some users reported a yellow discoloration of the screen that disappeared after several days, which was attributed to the glass lamination glue that was used. It did not have time to dry fully before the unit reached consumers due to the speed of manufacturing.<ref name="VB tech issues 1">{{cite web|url=http://mobile.venturebeat.com/2010/06/23/iphone-4-problems-crop-up-screen-discoloration-reception-issues-with-antenna-band|title=Apple iPhone 4 problems crop up: screen discoloration, reception issues|first=Devindra|last=Hardawar|date=June 23, 2010|publisher=[[Glam Media|MobileBeat]]|accessdate=June 24, 2010}}</ref> Another issue reported by some users within days of the iPhone 4 release was that during calls the proximity sensor can be insensitive, so that facial contact with the touchscreen can end calls, mute calls, and dial other numbers.<ref name="AI prox sensor 1">{{cite web|url=http://www.appleinsider.com/articles/10/06/28/users_report_issues_with_iphone_4_proximity_sensor_during_calls.html|title=Users report issues with iPhone 4 proximity sensor during calls|date=June 28, 2010|publisher=[[AppleInsider]]|accessdate=July 7, 2010}}</ref> Some users reported that, particularly in low-light condiditions, photos taken on the iPhone 4 sometimes contained blue or green "splotches". Issues with [[white balance]] were also discovered, particularly when using the flash.<ref name="smh 20100823">{{cite news|url=http://www.smh.com.au/digital-life/iphone/iphone-4-camera-rendered-useless-by-mysterious-fault-20100823-13ehb.html|work=The Sydney Morning Herald|first=Ben|last=Grubb|title=iPhone 4 camera rendered 'useless' by mysterious fault|date=August 23, 2010}}</ref><ref name=macworld-cameratint>{{cite web|title=Some iPhone 4 cameras have yellowing problem|url=http://www.macworld.com/article/1152434/iphone4flashissues.html|work=MacWorld|publisher=IDG|accessdate=20 December 2013}}</ref>
 
====Antenna====
Shortly after the iPhone 4 was launched, some consumers reported that signal strength of the phone was reduced when touching the lower left edge of the phone, bridging one of the two locations which separates the two antennas, resulting in dropped calls in some areas with lower signal reception.<ref name="gizmodo reception 1">{{cite web|last=Chen|first=Jason|title=iPhone 4 Loses Reception When Holding it By Antenna Band?|url=http://gizmodo.com/5571171/iphone-4-loses-reception-when-you-hold-it-by-the-antenna-band|publisher=[[Gizmodo]]|accessdate=June 24, 2010|date=June 24, 2010|archiveurl=http://archive.is/Hk9Pb|archivedate=January 2, 2013}}</ref><ref name="TA australia fans">{{cite web|url=http://www.theage.com.au/digital-life/iphone/iphone-4-fault-fails-to-surface-for-sydney-fans-20100730-10zsp.html|title=iPhone 4 fault fails to surface for Sydney fans|date=July 31, 2010|accessdate=July 31, 2010|work=The Age|location=Australia|first=Melissa|last=Singer}}</ref><ref name="BDI reception 1">{{cite web|title=Teste de Recepção do iPhone 4|date=July 19, 2010|accessdate=August 9, 2010|publisher=Blog do iPhone|url=http://www.blogdoiphone.com/2010/07/inedito-teste-de-recepcao-do-iphone-4-com-as-operadoras-brasileiras}}</ref> In response, Apple issued a statement advising that customers should "avoid gripping [the phone] in the lower left corner" when making or receiving a call.<ref name="BBC holding device 1">{{cite news|last=Cellan-Jones|first=Rory|title=Apple issues advice to avoid iPhone flaw|url=http://news.bbc.co.uk/1/hi/technology/8761240.stm|publisher=BBC News Online|accessdate=June 25, 2010|date=June 25, 2010}}</ref>
 
As a consequence of this problem, it was reported on July 2, 2010 that several iPhone 4 users were planning on suing [[Apple Inc.|Apple]] and [[AT&T]] for fraud by concealment, negligence, intentional misrepresentation and defective design. The legal challenge was started by California law firm [[Kershaw, Cutter & Ratinoff]], who set up a website to recruit disenchanted iPhone 4 buyers for a lawsuit against Apple.<ref name="sky sued 1">{{cite web|url=http://news.sky.com/skynews/Home/Technology/iPhone-4-Apple-Is-Sued-After-Complaints-Of-Reception-Problems-With-The-New-Smartphone/Article/201007115658175?|title=iPhone 4: Apple Is Sued After Complaints Of Reception Problems With The New Smartphone|last=Hewage|first=Tim|date=July 2, 2010|publisher=[[Sky News]]|accessdate=July 4, 2010}}</ref><ref name="yahoo sued 1">{{cite web|url=http://news.yahoo.com/s/nm/20100701/tc_nm/us_apple_lawsuits|archiveurl=http://web.archive.org/web/20100705181954/http://news.yahoo.com/s/nm/20100701/tc_nm/us_apple_lawsuits|archivedate=July 5, 2010|title=Consumers sue Apple over iPhone antenna problems|author1=Madway, Gabriel|author2=Grenon, Andre|date=July 1, 2010|publisher=[[Yahoo! News]]|accessdate=July 4, 2010}}</ref> Later that day, Apple issued another statement stating that it had discovered the cause of the "dramatic drop in bars".<ref name = "Statement by Apple on iPhone 4 reception issues"/>
 
Apple explained how the formula it used to calculate the number of bars to display was "wrong". Apple promised to correct the issue and release a software update within a few weeks that would address the "mistake", which had been present since the original [[iPhone (original)|iPhone]].<ref name = "Statement by Apple on iPhone 4 reception issues">{{Cite press release|title=Statement by Apple on iPhone 4 reception issues|publisher=[[Apple Inc.]]|date=July 2, 2010|url=http://www.apple.com/pr/library/2010/07/02appleletter.html|accessdate=July 2, 2010}}</ref> ''[[The New York Times]]'' commented that "the failure to detect this longstanding problem earlier is astonishing."<ref name="NYT signal bars 1">{{cite news|url=http://www.nytimes.com/2010/07/03/technology/03apple.html|title=Apple Acknowledges Flaw in iPhone Signal Meter|last=Helft|first=Miguel|date=July 2, 2010|work=The New York Times|accessdate=July 2, 2010}}</ref>
 
''[[Consumer Reports]]'' initially stated that the iPhone 4's signal issues are not "unique, and may not be serious" and it continued to mention that signal loss is a problem that is faced by the entire smartphone industry. It has been such a problem that Apple made a formal apology. The next day, the magazine altered their stance after encountering instances of dropped calls.<ref name="CR signal issue 1">{{cite web|url=http://blogs.consumerreports.org/electronics/2010/07/apple-iphone-4-antenna-problems-dropped-calls-att-signals-bars-os-software-bugs-glitches-os-os4-iphone4-reception-problems-in.html |title=Consumer Reports Electronics Blog: iPhone 4's supposed signal woes aren't unique, and may not be serious |publisher=Blogs.consumerreports.org |date= July 2, 2010 |accessdate= November 11, 2010}}</ref> The magazine rejected Apple's explanation after conducting tests in a controlled environment, and comparing the results against prior generations of iPhone. It sarcastically pointed out that using a piece of tape to cover the lower left antenna gap was one way to fix the problem, but recommended that consumers who "want an iPhone that works well without a masking-tape fix" purchase the [[iPhone 3GS]] instead.<ref name="consumerreports1">{{cite web|url=http://blogs.consumerreports.org/electronics/2010/07/apple-iphone-4-antenna-issue-iphone4-problems-dropped-calls-lab-test-confirmed-problem-issues-signal-strength-att-network-gsm.html|title=Lab tests: Why Consumer Reports can't recommend the iPhone 4|date=July 12, 2010|publisher=[[Consumer Reports]]|accessdate=July 12, 2010}}</ref> The magazine also tested the iPhone 4 while it was wearing a ''[[#Bumper|Bumper]]'', a frame-like cover sold by Apple that prevents direct contact with the antenna, reporting that it did resolve the problem.<ref name="CR bumper 1">{{cite web|url=http://blogs.consumerreports.org/electronics/2010/07/apple-iphone4-iphone-4-bumper-case-fixes-antenna-issue-problem-signal-loss-tested-verified-consumer-reports-labs-quick-fix.html|title = Apple's Bumper case alleviates the iPhone 4 signal-loss problem|date=July 13, 2010|publisher=[[Consumer Reports]]|accessdate=July 13, 2010}}</ref> ''[[CNN]]'' repeated ''Consumer Reports''' statement that a small amount of [[duct tape]] had proven an effective fix to the iPhone 4's dropped call issue.<ref name="CNN duct tape fix 1">{{cite news|url=http://www.cnn.com/2010/TECH/mobile/07/13/iphone.4.duct.tape/index.html?hpt=C1|title=iPhone duct tape fix|publisher=CNN|date=July 13, 2010|accessdate=July 13, 2010}}</ref>
 
On July 16, 2010, at a press conference, [[Steve Jobs]] announced that Apple would provide all iPhone 4 owners with a free case to help solve the antenna issue and a refund to those users who had already purchased a Bumper. The free case offer would be valid until September 30, 2010, when Apple would re-evaluate the situation.<ref name="NYT free cases 1">{{cite news|url=http://www.nytimes.com/2010/07/17/technology/17apple.html|title=Apple Offers Free Cases to Address iPhone Issue|newspaper=New York Times|date=July 16, 2010|first=Miguel|last=Helft}}</ref><ref name="MSNSC free bumpers 1">{{cite web|last=Rothman|first=Wilson|url=http://www.msnbc.msn.com/id/38263228/ns/technology_and_science-wireless|title=Apple gives free bumpers to all iPhone 4 owners|publisher=[[MSNBC]]|date=July 17, 2010|accessdate=July 17, 2010}}</ref> To get a free case, owners were able to apply via an app installed on the phone found in the App Store from July 22, 2010 to September 30, 2010. Jobs also announced that Apple could not produce enough Bumpers for all owners of the phone, but would source a supply and offer a range of cases.<ref name="Apple offers free iPhone 4 cases">{{cite news|title=Apple offers free iPhone 4 cases|url=http://www.bbc.co.uk/news/technology-10665424|publisher=BBC News Online|accessdate=July 19, 2010|date=July 16, 2010}}</ref> Additionally, Jobs cited figures from [[AppleCare]] which showed that only 0.55 percent of all iPhone 4 users have complained to the company about the issue, while the number of phones returned to Apple was 1.7 percent – 4.3 percentage points less than the number of iPhone 3GS models that were returned in the first month of the phone's launch.<ref name="Apple offers free iPhone 4 cases"/>
 
''Consumer Reports'' noted that the solution was not permanent, though a good first step.<ref name="CNN bumper fix 1">{{cite news|last=D. Sutter|first=John|url=http://www.cnn.com/2010/TECH/mobile/07/16/consumer.reports.iphone.case|title=Bumper and all, Consumer Reports still doesn't recommend iPhone 4|publisher=CNN|date=July 17, 2010|accessdate=July 17, 2010}}</ref>  However, because Jobs did not specify a time line for fixing the problem, and the offering for a free bumper only being a temporary solution, ''[[PC World (magazine)|PC World]]'' decided to remove the iPhone 4 from its "Top 10 Cell Phones" chart and reassign it to a pending rating.<ref name="PCW re-rated 1">{{cite web|first=Ginny|last=Mies|url=http://www.pcworld.com/article/201320/iphone_4_why_weve_reconsidered_its_rating.html|title=iPhone 4: Why We've Reconsidered Its Rating|publisher=PC World|date=July 17, 2010|accessdate=July 17, 2010}}</ref>
 
[[AnandTech]] researched iPhone 4 antenna and identified that its outer construction provides 5–9 dB (6.9–9 times) better sensitivity comparing to common internal antenna design of iPhone 3Gs (the phone keeps working connection with signal as low as −120/121 dB comparing to usual −113/115 dB).<ref name="AnandTech signal issue1">{{cite web|url=http://www.anandtech.com/show/3821/iphone-4-redux-analyzing-apples-ios-41-signal-fix|title=Page 1&2 of "The iPhone 4 Redux: Analyzing Apple's iOS 4.0.1 Signal Fix & Antenna Issue" by Brian Klug & Anand Lal Shimpi|publisher=[[AnandTech]]|date=July 15, 2010|accessdate=January 11, 2011}}</ref>
 
Despite the negative media attention regarding the antenna issues, 72% of iPhone 4 users say that they are "very satisfied" with their iPhone 4 according to an August 2010 survey by ChangeWave Research.<ref name="PCW users satisfied 1">{{cite web|url=http://www.pcworld.com/article/202625/survey_most_iphone_4_users_very_satisfied.html?tk=hp_blg|title=Survey: Most iPhone 4 Users 'Very Satisfied'|publisher=PCWorld|date=August 5, 2010|accessdate=November 11, 2010}}</ref> The iPhone 4 model continued to be sold unchanged up until September 2013.
 
==iPhones in space==
In 2011, two iPhone 4 units equipped with a special application were taken to the [[International Space Station]] aboard the [[Space Shuttle]] on the [[STS-135]] mission.<ref name=paul2>[http://www.pcworld.com/article/230166/apples_iphone_4_hired_as_tricorder_for_space_station.html#tk.mod_rel Apple's iPhone 4 Hired as Tricorder for Space Station, By Ian Paul, PCWorld, June 13, 2011]</ref> The devices were used in various experiments, utilizing sensors and a special app.<ref name=paul2/>
 
==Timeline of models==
{{Timeline of iPhone models}}
 
==See also==
{{Portal|Apple Inc.}}
*[[List of iOS devices]]
*[[Comparison of smartphones]]
 
==Notes==
{{Refbegin}}
*{{Note label|A|a|none}}The initial release date of June 24, 2010 applies only to the United States, the United Kingdom, France, Germany, and Japan.<ref name="cdn first shipping 1">{{cite press release|title=We will ship in 5 countries|publisher=[[Apple Inc.]]|date=June 7, 2010|url=http://www.blogcdn.com/www.engadget.com/media/2010/06/Apple-wwdc-2010-399-rm-eng.jpg|accessdate=June 21, 2010}}</ref>
*{{Note label|B|b|none}}SIM-free iPhone 4s are only available directly from Apple in United States, Canada, France, Germany<ref name="apple sim-free 1">{{cite web|url=http://store.apple.com/de/browse/home/shop_iphone/family/iphone?mco=OTY2ODA2OQ |title=iPhone 4 & iPhone 3GS – Apple Store (Deutschland) |publisher=Store.apple.com |accessdate= November 11, 2010}}</ref> and the United Kingdom as of the device's initial release.<ref name="9to5mac sim-free 1">{{cite web|url=http://www.9to5mac.com/17955/Apple-confirms-SIM-free-iPhones-are-truly-unlocked|title=Apple confirms SIM-free iPhones are truly unlocked|first=Jonny|last=Evans|date=June 15, 2010|publisher=[[9 to 5 Mac]]|accessdate=June 20, 2010}}</ref>
*{{Note label|C|c|none}}The Advanced Performance Optimization on iOS, part 2 session.
*{{Note label|D|d|none}}6 percent of iPhone 3GS models were returned within the first month of the phone being on sale.<ref name="Apple offers free iPhone 4 cases"/>
{{Refend}}
 
==References==
{{reflist|30em}}
 
==External links==
{{Commons category|iPhone 4}}
{{Wikinewspar2|Apple unveils iPhone 4, iOS 4 at Worldwide Developers Conference 2010|Apple swamped by iPhone 4 pre-orders|Apple to give free cases, refunds to iPhone 4 owners}}
*{{official website|http://www.apple.com/iphone/iphone-4/specs.html|iPhone 4}} – official site
 
{{S-start}}
{{Succession box
| title  = iPhone 4
| years  = 4th generation
| with  =
| before = [[iPhone 3GS]]
| after = [[iPhone 4S]]
}}
{{S-end}}
 
{{iOS}}
{{Apple hardware since 1998}}
{{Apple}}
 
[[Category:IPhone|*]]
[[Category:Products introduced in 2010]]
[[Category:Touchscreen mobile phones]]
[[Category:Videotelephony]]
[[Category:IOS (Apple)]]
[[Category:Active noise control mobile phones]]

Latest revision as of 20:01, 20 December 2014

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