iPhone 3G

Developer	Apple Inc.
Manufacturer	Foxconn[1]
Slogan(s)	"The iPhone you have been waiting for." "The first phone to beat the iPhone." "Twice as fast, for half the price." "The most advanced mobile OS. Now even more advanced." "New features, new price."[2]
Form factor	Slate
Generation	2nd (2G)
Model	A1324 (China) A1241[3]
Release date	July 11, 2008 (2008-07-11)[4]
Units sold	1 million over first weekend[5]
Operating system	iOS 4.2.1 (build 8C148) Released November 22, 2010; 18 months ago  (2010-11-22) No longer supported; third party operating systems available[6]
Power	1150 mAh, 3.7 V Internal, user inaccessible Rechargeable Li-ion[7]
CPU	Samsung 32-bit RISC ARM 1176JZ(F)-S v1.0[8] 620 MHz Underclocked to 412 MHz[9]
Storage capacity	8 or 16 GB flash memory
Memory	128 MB eDRAM[10]
Display	3.5-inch screen (diagonally) 320-by-480-pixel resolution at 163 ppi 2:3 aspect ratio 18-bit (262,144-color) LCD
Audio	3.5 mm TRRS One speaker 20 Hz to 20 kHz frequency response (internal, headset) Microphone
Input	Multi-touch touchscreen display 3-axis accelerometer Proximity sensor Ambient light sensor Microphone Headset controls
Connectivity	Quad-band GSM/GPRS/EDGE (850 900 1800 1900 MHz) Tri-band UMTS/HSDPA 3.6 (850 1900 2100 MHz) Wi-Fi (802.11 b/g) Bluetooth 2.0 + EDR USB 2.0/Dock connector[11]
Online services	App Store, iTunes Store, iBookstore, MobileMe
Dimensions	115.5 mm (4.55 in) H 62.1 mm (2.44 in) W 12.3 mm (0.48 in) D
Weight	133 g (4.7 oz)
Predecessor	iPhone
Successor	iPhone 3GS
Related articles	iPad, iPod Touch (comparison)
Website	apple.com/iphone

The iPhone 3G is a smartphone designed and marketed by Apple Inc. As the second generation of the iPhone, it was introduced on June 9, 2008 at the WWDC 2008 at the Moscone Center, San Francisco.

The iPhone 3G was very similar to its predecessor, but included several new hardware features, such as Assisted GPS, 3G data and tri-band UMTS/HSDPA. The iPhone 3 also benefited from software improvements in iPhoneOS 2.0 (which was introduced alongside the iPhone 3G), which alongside other features (including Push email and turn-by-turn navigation), introduced the new App Store — Apple's new distribution platform for third-party applications for the iPhone.^[12]

History[link]

On July 11, 2008, Apple released the iPhone 3G in twenty-two countries, including the original six; in 8GB and 16GB models, with the larger capacity version having the option of being in black or white.^[13][14]

When the iPhone 3GS was released one year later, the iPhone 3G became the budget model and its price was cut in half. The $99 iPhone 3G was available in black only and came with 8 GB of storage. Included with this revision is iPhone OS 3.0^[15] On June 7, 2010, the iPhone 3G was discontinued, and replaced with an 8 GB iPhone 3GS selling for the same price of $99.

Software[link]

This section is in a list format that may be better presented using prose. You can help by converting this section to prose, if appropriate. Editing help is available. (March 2011)

The iPhone 3G came preloaded with the latest version of iPhone OS both to offer the newest improvements to the software and to combat efforts of iOS jailbreaking^{[citation needed]}. Over the years, the iPhone 3G has been supported by Apple with software updates. Major iterations of the software usually released yearly.

At launch, in July 2008, the iPhone 3G came preloaded with iPhone OS 2.0 which introduced the App Store, Microsoft Exchange ActiveSync support, Apple’s MobileMe service, and push email support, along with other new features and bug fixes as well.

On June 2009, the iPhone 3G received the iPhone OS 3.0 software update which introduced the long-awaited MMS feature, copy and paste, landscape support for more applications, Bluetooth stereo support, and other improvements as well.

On June 2010, the iPhone 3G owners were issued the iOS 4.0 software update. Unlike its successor, the iPhone 3GS, it did not receive multitasking, home screen wallpaper, or Bluetooth keyboard support. However, it still got the unified mailbox feature, folders, playlist creation, among other enhancements in iOS 4. Still despite the number of new features the update introduced, it was widely criticized for its slow performance on the device.

However an update to iOS 4.1 was unveiled and released on September 2010 which improved the device’s performance under iOS 4. Unlike other iOS devices though, it did not receive the Game Center application.^[16]

On November 23, 2010, the iPhone 3G received the iOS 4.2 software update, which included new features such as YouTube voting, and security fixes. The iPhone 3G however did not receive many features including AirPlay, more options in the multitasking tray, and Safari Text Search. At this point, the iPhone 3G no longer received any future software updates.The iPhone 3G no longer receives software updates from Apple. The last release of iOS to support the 3G was 4.2.1, which was released on November 22, 2010. iOS 4.3, released on March 11, 2011, did not support the iPhone 3G.^[13]

Design[link]

A rear view of the original iPhone (left) made of aluminum and plastic, and the iPhone 3G, made entirely from a hard plastic material.^[17]

A view of an iPhone 3G after it had been dropped

The iPhone 3G's back features a redesigned plastic polycarbonate housing, replacing the aluminum back from the first generation. The buttons were also made from plastic to metal, and the edges of the phone were also tapered, providing a better grip of the phone. The iPhone 3G also introduced colors to the iPhone bringing black and white backs to the device. However only the 16GB version was available in both colors.

The dimensions of the iPhone 3G were slightly larger than those of the original iPhone. It was 4.55 inches (116 mm) high, 2.44 inches (62 mm) wide, and 0.48 inches (12 mm) deep, compared to its predecessor, which was 4.5 inches (110 mm) high, 2.4 inches (61 mm) wide, and 0.46 inches (12 mm) deep.

Hardware[link]

Screen and input[link]

The 9 cm touchscreen had a 320-by-480 (HVGA) resolution at 163 ppi, with scratch-resistant glass sitting on top of the display. The capacitive touchscreen was designed for a bare finger, or multiple fingers for multi-touch sensing.

The device also featured the same sensors its predecessor had. A repositioned proximity sensor which deactivates the display and touchscreen when the device is brought near the face during a call. This is done to save battery power and to prevent inadvertent inputs from the user’s face and ears. An ambient light sensor adjusts the display brightness which in turn saves battery power. A 3-axis accelerometer senses the orientation of the phone and changes the screen accordingly, allowing the user to easily switch between portrait and landscape mode..

Processor and memory[link]

Most of the iPhone 3G's internal hardware were based on the original iPhone. It still included a Samsung 32-bit RISC ARM11 620 MHz processor (underclocked to 412 MHz), a PowerVR MBX Lite 3D GPU, and 128 MB of eDRAM.

Camera[link]

On the rear of the device, the iPhone 3G featured the same fixed-focus 2.0 megapixel camera that its predecessor had. It had no optical zoom, flash, or autofocus, and did not support video recording, although various applications have allowed video recording on the device. The iPhone 3G's operating system also now supported the geotagging of photographs.

Connectivity[link]

In addition to EDGE, the iPhone 3G added Assisted GPS, 3G data, and tri-band UMTS/HSDPA. These enhancements allowed faster data downloads and turn-by-turn navigation with maps.

Like its predecessor and recent iPods, the iPhone 3G also features the same proprietary 30-pin dock connector for charging the device. It is also used to synchronize the device with a computer and to connect various accessories.

The iPhone 3G also featured a flush-mounted 3.5 mm headphone jack instead of the recessed headphone jack that was included on the original iPhone, thus it can be used with headphones other than those provided by Apple.

Battery[link]

The iPhone 3G features an internal rechargeable battery rated at 1150 mAh, which like its predecessor, is not user-replaceable. Apple states the iPhone 3G’s battery is capable of providing up six hours of web browsing on Wi-Fi, five hours on 3G and 25 hours of audio playback. It has 300 hours of standby. Unlike the first iPhone, the 3G uses a different battery which is fitted with a connector and is easier to replace.^{[citation needed]}

The battery life of the iPhone 3G has been criticized by several technology journalists as insufficient and less than Apple claims.^{[citation needed]}

Software[link]

Along with the iPhone 3G, the first major software update to iPhone OS 2.0 was released. It featured various new features and improvements over its predecessor, most notably the App Store.

App Store[link]

One of the main new features of iPhone OS 2.0 was the App Store, which allows users to install third party applications on their device. Before then, the only way to install custom applications on the device was via jailbreaking, of which Apple disproved of greatly. On the App Store's initial launch, 500 applications were available for download, and this amount has grown dramatically since then. The software update was also issued to original iPhone and iPod touch users which also gave them access to the App Store although iPod touch owners were required to pay a fee to update to the new version.

Issues[link]

Hairline cracks[link]

Since the iPhone 3G's public release, users have reported that there had been hairline cracks, especially on the white models.^[18] Some owners have found that the glass breaks when the iPhone falls onto a hard surface.

Battery life[link]

After the release of the iPhone 3G, many complaints were about battery life. This is also reflected by a J.D. Power and Associates custom satisfaction survey, which gave the “battery aspects” of the device its lowest rating of 2 out of 5 stars. That was after all of the firmware updates.^{[citation needed]}

iOS performance issues[link]

iOS 4, which was still compatible with the iPhone 3G, was released on June 21, 2010.

An article in the Wall Street Journal's Digits column on July 28, 2010 reported that iPhone 3G phones updating to iOS 4 responded slowly, had diminished battery life, and became excessively hot.^[19]

During a media event on September 1, 2010, Apple announced that iOS 4.1 would be released on September 8, 2010, claiming to fix issues with performance on the iPhone 3G, along with fixes for Bluetooth and proximity sensor issues and other updates.

These issues were never met and updating on the iPhone 3G stopped at iOS 4.2.1, weakened signal, increased heat and lagging issues are still notoriously common, many people downgrade through the use of 3rd party software to 3.1.3 which is commonly noted as the sweet spot for the 3G.^{[citation needed]}

Timeline of iPhone models[link]

See also[link]

Apple Inc. portal

• List of iOS devices
• Comparison of smartphones

References[link]

External links[link]

• Iphone 3g VS 3gs
• Official website, iPhone
• Official website, Apple

v t e iPhone Generations Original 3G 3GS 4 4S Features iBooks iBookstore iCloud iTunes Store iMovie iMessage iPod (Music) Mail Maps Safari (versions) Siri Spotlight SpringBoard Newsstand Find My Friends App Store Game Center iAd Push Notifications Cards FaceTime Notification Center YouTube Supporting software Cocoa Touch Core Animation iOS (version history) iTunes SDK VoiceOver WebKit Discontinued MobileMe Accessories Bumper Dock connector Earbuds 300-page bill FairPlay History iFund Jailbreaking

v t e Apple Inc. History Outline Founders Steve Jobs Steve Wozniak Ronald Wayne Board of directors Current Bill Campbell Millard Drexler Al Gore Tim Cook (CEO) Andrea Jung Arthur D. Levinson (Chairman) Ronald Sugar Bob Iger Former Jerry York Executives Current Tim Cook Eddy Cue Scott Forstall Jonathan Ive Bob Mansfield Peter Oppenheimer Phil Schiller Bruce Sewell Jeff Williams John Browett Former Ron Johnson Mark Papermaster Bertrand Serlet Sina Tamaddon Hardware products Apple TV iPad Original 2 3rd iPhone Original 3G 3GS 4 4S iPod Classic Nano Shuffle Touch Mac iMac MacBook MacBook Air MacBook Pro Mini Pro Discontinued products Accessories AirPort Thunderbolt Display iPod accessories Mighty Mouse Magic Mouse Magic Trackpad Keyboard Time Capsule Software products Aperture Bento FileMaker Pro Final Cut Studio GarageBand iLife iOS iTunes iWork Logic Studio Mac OS X Server QuickTime Safari Xsan Stores and services Developer AppleCare Apple Specialist Apple Store online App Store Certifications Game Center iAd Genius Bar iBookstore iTunes Store Mac App Store iWork.com MobileMe iCloud One to One ProCare Companies Braeburn Capital FileMaker Inc. Acquisitions Emagic FingerWorks Intrinsity Lala NeXT Nothing Real P.A. Semi Silicon Color Siri Spruce Technologies Related Advertising 1984 Think Different Get a Mac iPods Slogans Design IDg Typography History Community Criticism Litigation Book Category Portal Project Commons Template

It has been suggested that this article be split into multiple articles. (Discuss) Proposed since May 2012.

An iPhone 4S, the most recent generation of the iPhone

The iPhone ( /ˈaɪfoʊn/ EYE-fohn) is a line of smartphones designed and marketed by Apple Inc. The first iPhone was unveiled by Steve Jobs, then CEO of Apple, on January 9, 2007,^[1] and released on June 29, 2007. The 5th generation iPhone, the iPhone 4S, was announced on October 4, 2011, and released 10 days later.

An iPhone can function as a video camera (video recording was not a standard feature until the iPhone 3GS was released), a camera phone, a portable media player, and an Internet client with email and web browsing capabilities, can send texts and receive visual voicemail, and has both Wi-Fi and 3G connectivity. The user interface is built around the device's multi-touch screen, including a virtual keyboard rather than a physical one.

Third-party as well as Apple application software is available from the App Store, which launched in mid-2008 and now^[when?] has over 500,000^[2] "apps" approved by Apple. These apps have diverse functions, including games, reference, GPS navigation, social networking, security, and advertising for television shows, films, and celebrities.

There are five generations of iPhone models, each accompanied by one of the five major releases of iOS (formerly iPhone OS). The original iPhone was a GSM phone, and established design precedents, such as screen size and button placement, that have persisted through all models. The iPhone 3G added 3G cellular network capabilities and A-GPS location. The iPhone 3GS added a compass, faster processor, and higher resolution camera, including video recording at 480p.

The iPhone 4 has a rear-facing camera (720p video) and a front facing camera (at a lower resolution) for FaceTime video calling and for use in other apps like Skype. The iPhone 4 featured a higher-resolution 960 × 640 display; it was released on June 24, 2010. In the U.S., AT&T was the only authorized carrier until February 10, 2011, when a CDMA version of the iPhone 4 launched for Verizon. On October 4, 2011, Apple announced the iPhone 4S.^[3]

The iPhone 4S added a higher resolution camera (8 megapixel) with 1080p video recording, face detection, and video stabilization, a faster, dual core processor, support for both GSM/UMTS and CDMA on one chip, GLONASS support and a natural language voice control system called Siri.^[4] It is available in 16 GB and 32 GB, as well as a new 64 GB capacity. In the United States, it was announced that two new carriers, Sprint and C Spire, would begin carrying the iPhone 4 and iPhone 4S in October and November 2011, respectively.^[5] On April 20, 2012, six more regional US carriers (Cellcom, Appalachian Wireless, Alaska Communications, GCI, MTA Solutions, and nTelos) were added in to the list of iPhone service providers.^[6]

History and availability[link]

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bar:Q3_2007 from:start till:0.270000 text:0.27 million
bar:Q4_2007 from:start till:1.190000 text:1.19 million
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bar:Q2_2008 from:start till:1.703000 text:1.703 million
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bar:Q1_2011 from:start till:16.240000 text:16.240 million
bar:Q2_2011 from:start till:18.650000 text:18.65 million
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bar:Q4_2011 from:start till:17.070000 text:17.07 million
bar:Q1_2012 from:start till:37.040000 text:37.04 million
bar:Q2_2012 from:start till:35.100000 text:35.10 million

pos:(70,20) textcolor:gray fontsize:S text:Worldwide iPhone sales by Apple's fiscal

pos:(70,5) textcolor:gray fontsize:S text:quarters (Q1 2012 = Oct–Dec 2011).

Development of the iPhone began in 2005 with Apple CEO Steve Jobs' direction that Apple engineers investigate touchscreens.^[7] He also steered the original focus away from a tablet, like the iPad, and towards a phone.^[8] Apple created the device during a secretive collaboration with AT&T Mobility—Cingular Wireless at the time—at an estimated development cost of US$150 million over thirty months.^[9]

Apple rejected the "design by committee" approach that had yielded the Motorola ROKR E1, a largely unsuccessful^[10] collaboration with Motorola. Instead, Cingular gave Apple the liberty to develop the iPhone's hardware and software in-house^[11][12] and even paid Apple a fraction of its monthly service revenue (until the iPhone 3G),^[13] in exchange for four years of exclusive U.S. sales, until 2011.

Jobs unveiled the iPhone to the public on January 9, 2007, at the Macworld 2007 convention at the Moscone Center in San Francisco. The iPhone went on sale in the United States on June 29, 2007, at 6:00 pm local time, while hundreds of customers lined up outside the stores nationwide.^[14] The passionate reaction to the launch of the iPhone resulted in sections of the media christening it the 'Jesus phone'.^[15][16] The original iPhone was made available in the UK, France, and Germany in November 2007, and Ireland and Austria in the spring of 2008.

Worldwide iPhone availability:

  iPhone was available since its original release

  iPhone was available since the release of iPhone 3G

  Coming soon

On July 11, 2008, Apple released the iPhone 3G in twenty-two countries, including the original six.^[17] Apple released the iPhone 3G in upwards of eighty countries and territories.^[18] Apple announced the iPhone 3GS on June 8, 2009, along with plans to release it later in June, July, and August, starting with the U.S., Canada and major European countries on June 19. Many would-be users objected to the iPhone's cost,^[19] and 40% of users have household incomes over US$100,000.^[20]

In an attempt to gain a wider market, Apple retained the 8 GB iPhone 3G at a lower price. When Apple introduced the iPhone 4, the 3GS became the less expensive model. Apple reduced the price several times since the iPhone's release in 2007, at which time an 8 GB iPhone sold for $599. An iPhone 3GS with the same capacity now has no cost to the customer, as of the release of the iPhone 4S. However, these numbers are misleading, since all iPhone units sold through AT&T require a two-year contract costing several thousand dollars, including an early termination fee,^[21] and a SIM lock.

Apple sold 6.1 million original iPhone units over five quarters.^[22] Recorded sales have been growing steadily thereafter, and by the end of fiscal year 2010, a total of 73.5 million iPhones were sold.^[23] By 2010/2011, the iPhone had a market share of barely 4% of all cellphones, but Apple still pulls in more than 50% of the total profit that global cellphone sales generate.^[24] Sales in Q4 2008 surpassed temporarily those of RIM's BlackBerry sales of 5.2 million units, which made Apple briefly the third largest mobile phone manufacturer by revenue, after Nokia and Samsung.^[25] Approximately 6.4 million iPhones are active in the U.S. alone.^[20] While iPhone sales constitute a significant portion of Apple's revenue, some of this income is deferred.^[26]

Three generations of iPhone, shown from behind. Left to right: original, white 3G, black 4.

The back of the original iPhone was made of aluminum with a black plastic accent. The iPhone 3G and 3GS feature a full plastic back to increase the strength of the GSM signal.^[27] The iPhone 3G was available in an 8 GB black model, or a black or white option for the 16 GB model. They both are now discontinued. The iPhone 3GS was available in both colors, regardless of storage capacity.

The white model was discontinued in favor of a black 8 GB low-end model. The iPhone 4 has an aluminosilicate glass front and back with a stainless steel edge that serves as the antennas. It was at first available in black; the white version was announced, but not released until April 2011, 10 months later.

The iPhone has garnered positive reviews from such critics as David Pogue^[28] and Walter Mossberg.^[29][30] The iPhone attracts users of all ages,^[20] and, besides consumer use, the iPhone has also been adopted for business purposes.^[31]

Users of the iPhone 4 reported dropped/disconnected telephone calls when holding their phones in a certain way. This became known as antennagate. ^[32]

On January 11, 2011, Verizon announced during a media event that it had reached an agreement with Apple and would begin selling a CDMA2000 iPhone 4. Verizon said it would be available for pre-order on February 3, with a release set for February 10.^[33][34] In February 2011, the Verizon iPhone accounted for 4.5 percent of all iPhone ad impressions^[vague] in the U.S. on Millennial Media's mobile ad network.^[35] On March 2, 2011, at the iPad 2 event, Apple announced that they have sold 100 million iPhones worldwide.^[36]

On Tuesday, September 27, Apple sent invitations for a press event to be held October 4, 2011 at 10:00 am at the Cupertino Headquarters to announce details of the next generation iPhone, which turned out to be iPhone 4S. Over 1 million 4S models were sold in the first 24 hours after its release in October 2011.^[37] Due to large volumes of the iPhone being manufactured and the its high selling price, Apple became the largest mobile handset vendor in the world by revenue, in 2011, surpassing long-time leader Nokia;^[38] however, later that year, it was surpassed by Samsung, a major manufacturer of Android phones.^[39] American carrier C Spire Wireless announced that it would be carrying the iPhone 4S on October 19, 2011.^[5] In February 2012, ComScore reported that 12.4% of US mobile subscribers use an iPhone.^[40] The iPhone 4S launch was also the biggest launch^[41] for any smartphone in the history of mobile device market.

The iPhone 4S box. All iPhones have come in boxes.

Hardware[link]

Screen and input[link]

The touchscreen on all models is a 9 cm (3.5 in) liquid crystal display with scratch-resistant glass.^[42] The capacitive touchscreen is designed for a bare finger, or multiple fingers for multi-touch sensing. The screens on the first three generations have a resolution of 320 × 480 (HVGA) at 163 ppi, while those on the iPhone 4 and iPhone 4S have a resolution of 640 × 960 at 326 ppi.

The touch and gesture features of the iPhone are based on technology originally developed by FingerWorks.^[43] Most gloves and styli prevent the necessary electrical conductivity;^{[44][45][46][47]} however, capacitive styli can be used with iPhone's finger-touch screen. The iPhone 3GS and later also feature a fingerprint-resistant oleophobic coating.^[48]

The top and side of an iPhone 3GS, externally identical to the iPhone 3G. From left to right, sides: wake/sleep button, SIM card slot, headphone jack, silence switch, volume controls. The switches were black plastic on the original iPhone. Top: earpiece, screen.

The iPhone has a minimal hardware user interface, featuring only four or five buttons, depending on the generation. The only physical menu button is situated directly below the display, and is called the "Home button" because it closes the active app and navigates to the home screen of the interface. The home button is denoted not by a house, as on many other similar devices, but a rounded square, reminiscent of the shape of icons on the home screen.

A multifunction sleep/wake button is located on the top of the device. It serves as the unit's power button, and also controls phone calls. When a call is received, pressing the sleep/wake button once silences the ringtone, and when pressed twice transfers the call to voicemail. Situated on the left spine are the volume adjustment controls. The iPhone 4 has two separate circular buttons to increase and decrease the volume; all earlier models house two switches under a single plastic panel, known as a rocker switch, which could reasonably be counted as either one or two buttons.

Directly above the volume controls is a ring/silent switch that when engaged mutes telephone ringing, alert sounds from new & sent emails, text messages, and other push notifications, camera shutter sounds, Voice Memo sound effects, phone lock/unlock sounds, keyboard clicks, and spoken autocorrections. This switch does not mute alarm sounds from the Clock application, and in some countries or regions it will not mute the camera shutter or Voice Memo sound effects.^[49] All buttons except Home were made of plastic on the original iPhone and metal on all later models. The touchscreen furnishes the remainder of the user interface.

The display responds to three sensors (four on the iPhone 4). A proximity sensor deactivates the display and touchscreen when the device is brought near the face during a call. This is done to save battery power and to prevent inadvertent inputs from the user's face and ears. An ambient light sensor adjusts the display brightness which in turn saves battery power. A 3-axis accelerometer senses the orientation of the phone and changes the screen accordingly, allowing the user to easily switch between portrait and landscape mode.^[50] Photo browsing, web browsing, and music playing support both upright and left or right widescreen orientations.^[51]

Unlike the iPad, the iPhone does not rotate the screen when turned upside-down, with the Home button above the screen, unless the running program has been specifically designed to do so. The 3.0 update added landscape support for still other applications, such as email, and introduced shaking the unit as a form of input.^[52][53] The accelerometer can also be used to control third-party apps, notably games. The iPhone 4 also includes a gyroscopic sensor, enhancing its perception of how it is moved.

A software update in January 2008^[54] allowed the first-generation iPhone to use cell tower and Wi-Fi network locations trilateration,^[55] despite lacking GPS hardware. The iPhone 3G, 3GS and 4 employ A-GPS, and the iPhone 3GS and 4 also have a digital compass.^[56] iPhone 4S supports GLONASS global positioning system in addition to GPS.

Audio and output[link]

One of two speakers (left) and the microphone (right) surround the dock connector on the base of the original iPhone. If a headset is plugged in, sound is played through it instead.

On the bottom of the iPhone there is a speaker to the left of the dock connector and a microphone to the right. There is an additional loudspeaker above the screen that serves as an earpiece during phone calls. The iPhone 4 includes an additional microphone at the top of the unit for noise cancellation, and switches the placement of the microphone and speaker on the base on the unit—the speaker is on the right.^[57] Volume controls are located on the left side of all iPhone models and as a slider in the iPod application.

The 3.5 mm TRRS connector for the headphones is located on the top left corner of the device.^[58] The headphone socket on the original iPhone is recessed into the casing, making it incompatible with most headsets without the use of an adapter.^[59][60] Subsequent generations eliminated the issue by using a flush-mounted headphone socket. Cars equipped with an auxiliary jack allow for handsfree use of the iPhone while driving as a substitute for Bluetooth.

While the iPhone is compatible with normal headphones, Apple provides a headset with additional functionality. A multipurpose button near the microphone can be used to play or pause music, skip tracks, and answer or end phone calls without touching the iPhone. A small number of third-party headsets specifically designed for the iPhone also include the microphone and control button.^[61] The current headsets also provide volume controls, which are only compatible with more recent models.^[62] These features are achieved by a fourth ring in the audio jack that carries this extra information.

The built-in Bluetooth 2.x+EDR supports wireless earpieces and headphones, which requires the HSP profile. Stereo audio was added in the 3.0 update for hardware that supports A2DP.^[52][53] While non-sanctioned third-party solutions exist, the iPhone does not officially support the OBEX file transfer protocol.^[63] The lack of these profiles prevents iPhone users from exchanging multimedia files, such as pictures, music and videos, with other bluetooth-enabled cell phones.

Composite^[64] or component^[65] video at up to 576i and stereo audio can be output from the dock connector using an adapter sold by Apple. iPhone 4 also supports 1024 × 768 VGA output^[66] without audio, and HDMI output,^[67] with stereo audio, via dock adapters. The iPhone did not support voice recording until the 3.0 software update.^[52][53]

Battery[link]

Replacing the battery requires disassembling the iPhone unit and exposing the internal hardware

The iPhone features an internal rechargeable lithium-ion battery. Like an iPod, but unlike most other mobile phones, the battery is not user-replaceable.^[59][68] The iPhone can be charged when connected to a computer for syncing across the included USB to dock connector cable, similar to charging an iPod. Alternatively, a USB to AC adapter (or "wall charger," also included) can be connected to the cable to charge directly from an AC outlet. A number of third-party accessories (car chargers, portable chargers, battery cases, stereo dock chargers, and even solar chargers) are also available.^{[citation needed]}

Apple runs tests on preproduction units to determine battery life. Apple's website says that the battery life "is designed to retain up to 80 percent of its original capacity after 400 full charge and discharge cycles",^[69] which is comparable to iPod batteries.

The battery life of early models of the iPhone has been criticized by several technology journalists as insufficient and less than Apple's claims.^{[70][71][72][73]} This is also reflected by a J. D. Power and Associates customer satisfaction survey, which gave the "battery aspects" of the iPhone 3G its lowest rating of 2 out of 5 stars.^[74][75]

If the battery malfunctions or dies prematurely, the phone can be returned to Apple and replaced for free while still under warranty.^[76] The warranty lasts one year from purchase and can be extended to two years with AppleCare. The battery replacement service and its pricing was not made known to buyers until the day the product was launched,^[77][78] it is similar to how Apple (and third parties) replace batteries for iPods. The Foundation for Taxpayer and Consumer Rights, a consumer advocate group, has sent a complaint to Apple and AT&T over the fee that consumers have to pay to have the battery replaced.^[77]

Since July 2007, third-party battery replacement kits have been available^[79] at a much lower price than Apple's own battery replacement program. These kits often include a small screwdriver and an instruction leaflet, but as with many newer iPod models the battery in the original iPhone has been soldered in. Therefore a soldering iron is required to install the new battery. The iPhone 3G uses a different battery fitted with a connector that is easier to replace.^[80]

The iPhone 4 is the first generation to have two cameras. The LED flash for the rear-facing camera (top) and the forward-facing camera (bottom) are both unique to that model.

Camera[link]

The original iPhone and iPhone 3G feature a built-in fixed focus 2.0 megapixel camera located on the back for still digital photos. It has no optical zoom, flash or autofocus, and does not support video recording (iPhone 3G does support video recording via third-party App available on the App Store), however jailbreaking allows users to do so. Version 2.0 of iPhone OS introduced the capability to embed location data in the pictures, producing geocoded photographs.

The iPhone 3GS has a 3.2 megapixel camera, manufactured by OmniVision, featuring autofocus, auto white balance, and auto macro (up to 10 cm). It is also capable of capturing 640 × 480 (VGA resolution) video at 30 frames per second,^[81] although compared to higher-end CCD based video cameras it does exhibit the rolling shutter effect.^[82] The video can then be cropped on the device itself and directly uploaded to YouTube, MobileMe, or other services.

The iPhone 4 introduced a 5.0 megapixel camera (2592 × 1936 pixels), also located on the back, which is equipped with a backside illuminated sensor capable of capturing pictures in low-light conditions, as well as an LED flash capable of staying lit for video recording at 720p resolution, considered high-definition.^[83] iPhone 4 is the first iPhone that has the high dynamic range photography feature.^[84] In addition the iPhone 4 has a second camera on the front capable of VGA photos and SD video recording.

Regardless of the source, saved recordings may be synced to the host computer, attached to email, or (where supported) sent by MMS. Videos may be uploaded to YouTube directly.

The camera on the iPhone 4S is capable of shooting 8MP stills and recording 1080p videos. The camera can now be accessed directly from the lock screen, and the volume up button as a shutter trigger. The built-in gyroscope is able to stabilize the camera while recording video.

Beta code pulled from iOS 5 suggests that the next feature to be released will allow users to capture a panoramic photo on their iPhone.^[85]

On all five model generations, the phone can be configured to bring up the camera app by quickly pressing the home key twice.^[86] On all iPhones running iOS 5 it can also be accessed from the lock screen directly.

Storage and SIM[link]

An iPhone 3G with the SIM slot open. The SIM ejector tool is still placed in the eject hole.

The iPhone was initially released with two options for internal storage size: 4 GB or 8 GB. On September 5, 2007, Apple discontinued the 4 GB models.^[87] On February 5, 2008, Apple added a 16 GB model.^[88] The iPhone 3G was available in 16 GB and 8 GB. The iPhone 3GS came in 16 GB and 32 GB variants and still is available in 8 GB.

The iPhone 4 is available in 16 GB and 32 GB variants, as well as a newly introduced 8 GB variant to be sold along side the iPhone 4S at a reduced price point. The iPhone 4S is available in three sizes: 16 GB, 32 GB and 64 GB. All data is stored on the internal flash drive; the iPhone does not support expanded storage through a memory card slot, or the SIM card.

GSM models of the iPhone use a SIM card to identify themselves to the GSM network. The SIM sits in a tray, which is inserted into a slot at the top of the device. The SIM tray can be ejected with a paperclip or the "SIM ejector tool" (a simple piece of die-cut sheet metal) included with the iPhone 3G and 3GS.^[89][90] Some iPhone models shipped with a SIM ejector tool which was fabricated from an alloy dubbed "Liquidmetal".^[91] In most countries, the iPhone is usually sold with a SIM lock, which prevents the iPhone from being used on a different mobile network.^[92]

The GSM iPhone 4 features a MicroSIM card that is located in a slot on the right side of the device.^[93]

The CDMA model of the iPhone, like all CDMA phones, does not use a SIM.

Liquid contact indicators[link]

The iPhone is equipped with liquid contact indicators which change from white to red in color when they come in contact with water. These suggest whether water damage has affected the device. The indicators on the iPhone include a small disc which is located at the bottom of the headphone jack and with the iPhone 3G and all later models an additional one is located at the bottom of the dock connector.^[94]

The indicators are often used by Apple employees to determine whether the device qualifies for a warranty repair or replacement. If the indicators show that the device was exposed to water, they may determine that the device is not covered by Apple. However, the liquid contact indicators may be triggered through routine use, and if a device is worn while exercising, the sweat from an owner may dampen the indicators enough to indicate water damage.^[95]

On many other mobile phones from different manufacturers, the liquid contact indicators are located in a protected location, such as beneath the battery behind a battery cover, but the indicators on an iPhone are directly exposed to the environment. This has led to criticism of the placement of the indicators, which may also be affected by steam in a bathroom or other light environmental moisture.^[96] In response to these criticisms, Apple made a silent change to their water damage policy for iPhones and similar products. This new policy allows the customer to request further internal inspection of the phone to verify if internal liquid damage sensors were triggered.^[97]

Included items[link]

The contents of the box of an iPhone 4. From left to right: iPhone 4 in plastic holder, written documentation, and (top to bottom) headset, USB cable, wall charger.

All iPhone models include written documentation, and a dock connector to USB cable. The original and 3G iPhones also came with a cleaning cloth. The original iPhone included stereo headset (earbuds and a microphone) and a plastic dock to hold the unit upright while charging and syncing. The iPhone 3G includes a similar headset plus a SIM eject tool (the original model requires a paperclip). The iPhone 3GS includes the SIM eject tool and a revised headset, which adds volume buttons (not functional with previous iPhone versions).^[62][98]

The iPhone 3G and 3GS are compatible with the same dock, sold separately, but not the original model's dock.^[99] All versions include a USB power adapter, or "wall charger," which allows the iPhone to charge from an AC outlet. The iPhone 3G and iPhone 3GS sold in North America, Japan, Colombia, Ecuador, or Peru^[100][101] include an ultracompact USB power adapter.

Model comparison[link]

This table highlights key differences between "generations" of the iPhone.

Software[link]

The iPhone, iPod Touch and iPad run an operating system known as iOS (formerly iPhone OS). It is a variant of the same Darwin operating system core that is found in Mac OS X. Also included is the "Core Animation" software component from Mac OS X v10.5 Leopard. Together with the PowerVR hardware (and on the iPhone 3GS, OpenGL ES 2.0), it is responsible for the interface's motion graphics. The operating system takes up less than half a gigabyte.^[121]

It is capable of supporting bundled and future applications from Apple, as well as from third-party developers. Software applications cannot be copied directly from Mac OS X but must be written and compiled specifically for iOS.

Like the iPod, the iPhone is managed from a computer using iTunes. The earliest versions of the OS required version 7.3 or later, which is compatible with Mac OS X version 10.3.9 Panther or later, and 32-bit Windows XP or Vista.^[122] The release of iTunes 7.6 expanded this support to include 64-bit versions of XP and Vista,^[123] and a workaround has been discovered for previous 64-bit Windows operating systems.^[124]

Apple provides free updates to the OS for the iPhone through iTunes,^[121] and major updates have historically accompanied new models.^[125] Such updates often require a newer version of iTunes — for example, the 3.0 update requires iTunes 8.2 — but the iTunes system requirements have stayed the same. Updates include both security patches and new features.^[126] For example, iPhone 3G users initially experienced dropped calls until an update was issued.^[127][128]

Version 3.1 required iTunes 9.0, and iOS 4 required iTunes 9.2. iTunes 10.5, which is required to sync and activate iOS 5, the current version of iTunes, Requires Mac OS X 10.5.8 or Leopard on G4 or G5 computers on 800 MHz or higher; versions 10.3 and 10.4 and 10.5–10.5.7 are no longer supported.

Interface[link]

The interface is based around the home screen, a graphical list of available applications. iPhone applications normally run one at a time (not including iOS 4 and iOS 5, which includes running applications in the background),^[129] although most functionality is still available when making a call or listening to music. The home screen can be accessed at any time by a hardware button below the screen, closing the open application in the process.^[130]

By default, the Home screen contains the following icons: Messages (SMS and MMS messaging), Calendar, Photos, Camera, YouTube, Stocks, Maps (Google Maps), Weather, Voice Memos, Notes, Clock, Calculator, Settings, iTunes (store), App Store, and (on the iPhone 3GS and iPhone 4) Compass. Docked at the base of the screen, four icons for Phone, Mail, Safari (Internet), and iPod (multimedia) delineate the iPhone's main purposes.^[131] On January 15, 2008, Apple released software update 1.1.3, allowing users to create "Web Clips", home screen icons that resemble apps that open a user-defined page in Safari. After the update, iPhone users can rearrange and place icons on up to nine other adjacent home screens, accessed by a horizontal swipe.^[54]

Users can also add and delete icons from the dock, which is the same on every home screen. Each home screen holds up to sixteen icons, and the dock holds up to four icons. Users can delete Web Clips and third-party applications at any time, and may select only certain applications for transfer from iTunes. Apple's default programs, however, may not be removed. The 3.0 update adds a system-wide search, known as Spotlight, to the left of the first home screen.^[52][53]

Almost all input is given through the touch screen, which understands complex gestures using multi-touch. The iPhone's interaction techniques enable the user to move the content up or down by a touch-drag motion of the finger. For example, zooming in and out of web pages and photos is done by placing two fingers on the screen and spreading them farther apart or bringing them closer together, a gesture known as "pinching".

Scrolling through a long list or menu is achieved by sliding a finger over the display from bottom to top, or vice versa to go back. In either case, the list moves as if it is pasted on the outer surface of a wheel, slowly decelerating as if affected by friction. In this way, the interface simulates the physics of a real object.

Other user-centered interactive effects include horizontally sliding sub-selection, the vertically sliding keyboard and bookmarks menu, and widgets that turn around to allow settings to be configured on the other side. Menu bars are found at the top and bottom of the screen when necessary. Their options vary by program, but always follow a consistent style motif. In menu hierarchies, a "back" button in the top-left corner of the screen displays the name of the parent folder.

Phone[link]

The iPhone allows audio conferencing, call holding, call merging, caller ID, and integration with other cellular network features and iPhone functions. For example, if music is playing when a call is received, the music fades out, and fades back in when the call has ended.

The proximity sensor shuts off the screen and touch-sensitive circuitry when the iPhone is brought close to the face, both to save battery and prevent unintentional touches. The iPhone does not support video calling or videoconferencing on versions prior to the fourth generation, as there is only one camera on the opposite side of the screen.^[132]

The iPhone 4 supports video calling using either the front or back camera over Wi-Fi, a feature Apple calls FaceTime.^[133] The first two models only support voice dialing through third-party applications.^[134] Voice control, available only on the iPhone 3GS and iPhone 4, allows users to say a contact's name or number and the iPhone will dial.^[135]

The iPhone includes a visual voicemail (in some countries)^[136] feature allowing users to view a list of current voicemail messages on-screen without having to call into their voicemail. Unlike most other systems, messages can be listened to and deleted in a non-chronological order by choosing any message from an on-screen list.

A music ringtone feature was introduced in the United States on September 5, 2007. Users can create custom ringtones from songs purchased from the iTunes Store for a small additional fee. The ringtones can be 3 to 30 seconds long from any part of a song, can fade in and out, pause from half a second to five seconds when looped, or loop continuously. All customizing can be done in iTunes,^[137] or alternatively with Apple's GarageBand software 4.1.1 or later (available only on Mac OS X)^[138] or third-party tools.^[139]

Multimedia[link]

The layout of the music library is similar to that of an iPod or current Symbian S60 phones. The iPhone can sort its media library by songs, artists, albums, videos, playlists, genres, composers, podcasts, audiobooks, and compilations. Options are always presented alphabetically, except in playlists, which retain their order from iTunes. The iPhone uses a large font that allows users plenty of room to touch their selection.

Users can rotate their device horizontally to landscape mode to access Cover Flow. Like on iTunes, this feature shows the different album covers in a scroll-through photo library. Scrolling is achieved by swiping a finger across the screen. Alternatively, headset controls can be used to pause, play, skip, and repeat tracks. On the iPhone 3GS, the volume can be changed with the included Apple Earphones, and the Voice Control feature can be used to identify a track, play songs in a playlist or by a specific artist, or create a Genius playlist.^[135]

The iPhone supports gapless playback.^[140] Like the fifth-generation iPods introduced in 2005, the iPhone can play digital video, allowing users to watch TV shows and movies in widescreen. Double-tapping switches between widescreen and fullscreen video playback.

The iPhone allows users to purchase and download songs from the iTunes Store directly to their iPhone. The feature originally required a Wi-Fi network, but now^[when?] can use the cellular data network if one is not available.^[141]

The iPhone includes software that allows the user to upload, view, and email photos taken with the camera. The user zooms in and out of photos by sliding two fingers further apart or closer together, much like Safari. The Camera application also lets users view the camera roll, the pictures that have been taken with the iPhone's camera. Those pictures are also available in the Photos application, along with any transferred from iPhoto or Aperture on a Mac, or Photoshop on a Windows PC.

Internet connectivity[link]

Internet access is available when the iPhone is connected to a local area Wi-Fi or a wide area GSM or EDGE network, both second-generation (2G) wireless data standards. The iPhone 3G introduced support for third-generation UMTS and HSDPA 3.6,^[142] only the iPhone 4S supports HSUPA networks (14.4 Mbit/s), and only the iPhone 3GS and iPhone 4 support HSDPA 7.2.^[143]

AT&T introduced 3G in July 2004,^[144] but as late as 2007, Steve Jobs stated that it was still not widespread enough in the US, and the chipsets not energy efficient enough, to be included in the iPhone.^[45][145] Support for 802.1X, an authentication system commonly used by university and corporate Wi-Fi networks, was added in the 2.0 version update.^[146]

By default, the iPhone will ask to join newly discovered Wi-Fi networks and prompt for the password when required. Alternatively, it can join closed Wi-Fi networks manually.^[147] The iPhone will automatically choose the strongest network, connecting to Wi-Fi instead of EDGE when it is available.^[148] Similarly, the iPhone 3G, 3GS and 4 prefer 3G to 2G, and Wi-Fi to either.^[149]

Wi-Fi, Bluetooth, and 3G (on the iPhone 3G, 3GS, 4, and 4S) can all be deactivated individually. Airplane mode disables all wireless connections at once, overriding other preferences. However, once in Airplane mode, one can explicitly enable Wi-Fi and/or Bluetooth modes to join and continue to operate over one or both of those networks while the cellular network transceivers remain off.

The iPhone 3GS has a maximum download rate of 7.2 Mbit/s.^[150] Furthermore, email attachments as well as apps and media from Apple's various stores must be smaller than 20 MB to be downloaded over a cellular network.^[151] Larger files, often email attachments or podcasts, must be downloaded over Wi-Fi (which has no file size limits). If Wi-Fi is unavailable, one workaround is to open the files directly in Safari.^[152]

Safari is the iPhone's native web browser, and it displays pages similar to its Mac and Windows counterparts. Web pages may be viewed in portrait or landscape mode and the device supports automatic zooming by pinching together or spreading apart fingertips on the screen, or by double-tapping text or images.^[153][154] It is worth mentioning that Safari doesn't allow file downloads except for predefined extensions. The iPhone supports neither Flash^[155] nor Java.^{[156][unreliable source?]}

Consequently, the UK's Advertising Standards Authority adjudicated that an advertisement claiming the iPhone could access "all parts of the internet" should be withdrawn in its current form, on grounds of false advertising.^[157] In a rare public letter in April 2010, Apple CEO Steve Jobs outlined the reasoning behind the absence of Flash on the iPhone (and iPad).^[158] The iPhone supports SVG, CSS, HTML Canvas, and Bonjour.^[159][160]

The maps application can access Google Maps in map, satellite, or hybrid form. It can also generate directions between two locations, while providing optional real-time traffic information. During the iPhone's announcement, Jobs demonstrated this feature by searching for nearby Starbucks locations and then placing a prank call to one with a single tap.^[7][161] Support for walking directions, public transit, and street view was added in the version 2.2 software update, but no voice-guided navigation.^[162]

The iPhone 3GS and iPhone 4 can orient the map with its digital compass.^[56] Apple also developed a separate application to view YouTube videos on the iPhone, which streams videos after encoding them using the H.264 codec. Simple weather and stock quotes applications also tap in to the Internet.

iPhone users can and do access the Internet frequently, and in a variety of places. According to Google, in 2008, the iPhone generated 50 times more search requests than any other mobile handset.^[163] According to Deutsche Telekom CEO René Obermann, "The average Internet usage for an iPhone customer is more than 100 megabytes. This is 30 times the use for our average contract-based consumer customers."^[164] Nielsen found that 98% of iPhone users use data services, and 88% use the internet.^[20] In China, the iPhone 3G and iPhone 3GS were built and distributed without Wi-fi.^[165]

With the introduction of the Verizon iPhone in January 2011, the issue of using internet while on the phone has been brought to the public's attention. Under the two US carriers, internet and phone could be used simultaneously on AT&T networks, whereas the Verizon networks only support for the use of each separately.^[166]

Text input[link]

For text input, the iPhone implements a virtual keyboard on the touchscreen. It has automatic spell checking and correction, predictive word capabilities, and a dynamic dictionary that learns new words. The keyboard can predict what word the user is typing and complete it, and correct for the accidental pressing of keys near the presumed desired key.^[167]

The keys are somewhat larger and spaced farther apart when in landscape mode, which is supported by only a limited number of applications. Touching a section of text for a brief time brings up a magnifying glass, allowing users to place the cursor in the middle of existing text. The virtual keyboard can accommodate 21 languages, including character recognition for Chinese.^[168]

Alternate characters with accents can be typed from the keyboard by pressing the letter for 2 seconds and selecting the alternate character from the popup.^[169] The 3.0 update brought support for cut, copy, or pasting text, as well as landscape keyboards in more applications.^[52][53] On iPhone 4S, Siri allows dictation.

Email and text messages[link]

The iPhone also features an email program that supports HTML email, which enables the user to embed photos in an email message. PDF, Word, Excel, and Powerpoint attachments to mail messages can be viewed on the phone.^[115] Apple's MobileMe platform offers push email, which emulates the functionality of the popular BlackBerry email solution, for an annual subscription. Yahoo! offers a free push-email service for the iPhone. IMAP (although not Push-IMAP) and POP3 mail standards are also supported, including Microsoft Exchange^[170] and Kerio Connect.^[171]

In the first versions of the iPhone firmware, this was accomplished by opening up IMAP on the Exchange server. Apple has also licensed Microsoft ActiveSync and now^[when?] supports the platform (including push email) with the release of iPhone 2.0 firmware.^[172][173] The iPhone will sync email account settings over from Apple's own Mail application, Microsoft Outlook, and Microsoft Entourage, or it can be manually configured on the device itself. With the correct settings, the email program can access almost any IMAP or POP3 account.^[174]

Text messages are presented chronologically in a mailbox format similar to Mail, which places all text from recipients together with replies. Text messages are displayed in speech bubbles (similar to iChat) under each recipient's name. The iPhone has built-in support for emailmessage forwarding, drafts, and direct internal camera-to-email picture sending. Support for multi-recipient SMS was added in the 1.1.3 software update.^[175] Support for MMS was added in the 3.0 update, but not for the original iPhone^[52][53] and not in the U.S. until September 25, 2009.^[176][177]

Third-party applications[link]