i phone

iPhone (/ˈaɪfoʊn/ EYE-fohn) is a line of smartphones designed and marketed by Apple Inc. They run Apple's iOS mobile operating system.^[14] The first generation iPhone was released on June 29, 2007; the most recent iPhone model is the iPhone SE, which was unveiled at a special event on March 21, 2016.^[15][16]
The user interface is built around the device's multi-touch screen, including a virtual keyboard. The iPhone has Wi-Fi and can connect to cellular networks. An iPhone can shoot video (though this was not a standard feature until the iPhone 3GS), take photos, play music, send and receive email, browse the web, send and receive text messages, follow GPS navigation, record notes, perform mathematical calculations, and receive visual voicemail.^[17] Other functions—video games, reference works, social networking, etc.—can be enabled by downloading application programs (‘apps’); as of October 2013, the App Store offered more than one million apps by Apple and third parties^[18] and is ranked as the world's largest mobile software distribution network of its kind (by number of currently available applications).^{[citation needed]}
There are nine generations of iPhone models, each accompanied by one of the nine major releases of iOS. The original 1st-generation iPhone was a GSM phone and established design precedents, such as a button placement that has persisted throughout all releases and a screen size maintained for the next four iterations. The iPhone 3G added 3G cellular network capabilities and A-GPS location. The iPhone 3GS added a faster processor and a higher-resolution camera that could record video at 480p. The iPhone 4 featured a higher-resolution 960×640 "Retina Display", a VGA front-facing camera for video calling and other apps, and a 5-megapixel rear-facing camera with 720p video capture.^[19] The iPhone 4S upgrades to an 8-megapixel camera with 1080p video recording, a dual-core A5 processor, and a natural language voice control system called Siri.^[20] iPhone 5 features the dual-core A6 processor, increases the size of the Retina display to 4 inches, introduces LTE support and replaces the 30-pin dock connector with an all-digital Lightning connector. The iPhone 5C features the same A6 chip as the iPhone 5, along with a new backside-illuminated FaceTime camera and a new casing made of polycarbonate. The iPhone 5S features the dual-core 64-bit A7 processor, an updated camera with a larger aperture and dual-LED flash, and the Touch ID fingerprint scanner, integrated into the home button, and fitness tracking facilities. The iPhone 6 and iPhone 6 Plus further increased screen size, measuring at 4.7 inches and 5.5 inches, respectively. In addition, they also feature an A8 chip and M8 motion coprocessor. The iPhone 6S, iPhone 6S Plus, and iPhone SE all feature Apple's new dual-core 64-bit A9 chip, 2GB of RAM, a GT7600 (6-core) GPU, and the 3D Touch feature, which was introduced in the trackpads of the MacBook lineup as Force Touch. As of 2013, the iPhone 3GS had the longest production run, 1,181 days; followed by the iPhone 4, produced for 1,174 days.^[21]
The resounding sales of the iPhone, at the time, have been credited with reshaping the smartphone industry, and helping make Apple one of the world's most valuable publicly traded companies by 2011.^[22] The original iPhone was the first phone to use a design featuring a slate format with a touchscreen interface.^[23] Almost all modern smartphones have replicated this style of design.
In the US, the iPhone reigns supreme by a wide margin in the smartphone market. "According to recent data compiled by comScore, the iPhone’s share of the U.S. smartphone market now checks in at 43.6%. Following not too closely behind is Samsung with a 27.6% share of the market."^[24] In March 2014, sales of the iPhone brand had reached 500 million devices.^[25] In the last quarter of 2014, there were 74.5 million iPhones sold, a record, compared to 51.0 million in the last quarter of 2013.^[26] Tim Cook revealed at the Apple Watch conference on March 9, 2015, that Apple had sold a total of 700 million iPhones to date.

samsung galaxy note 2

The Galaxy Note II features a 5.5-inch HD Super AMOLED S-Stripe RGB (3 subpixels/pixel) (non-PenTile) screen with 1280×720 resolution, a 1.6 GHz quad-core Exynos CPU, 2 GB RAM, an 8 MP rear camera and 1.9 MP front camera, and a 3,100 mAh battery. It is slightly thinner than its predecessor at 9.4 mm (0.37 inches), albeit also being slightly heavier by 2 grams (0.071 oz). Depending on the specific model, the phone features HSPA+ 21 Mbit/s along with 4G LTE (42.2 Mbit/s DC-HSPA+ for LTE Version).^[20][21][22] The Galaxy Note II is equipped with Broadcom BCM4334 chipset for the IEEE 802.11 a/b/g/n Wi-Fi connectivity in 2.4 GHz and 5 GHz dual-band with maximum rate up to 150 Mbit/s, FM radio tuner and Bluetooth 4.0 + HS support.^[23]
The Galaxy Note II was supposed to be available in 16 GB, 32 GB and 64 GB storage capacity variants, each expandable by up to an additional 64 GB with a microSD card. However, as of 8 January 2013, only the 16 GB and 32 GB versions are available and there has been no release date for or any indication of a 64 GB version of the Note II to be offered

samsung galaxy note 3

The Galaxy Note 3's design was intended to carry a more upscale, "premium" look in comparison to previous Samsung devices. Although it carries a similarly polycarbonate-oriented design to other recent Samsung devices, the Galaxy Note 3 has a faux metallic bezel and a rear cover made of plastic leather with faux stitching. With a thickness of 8.3 mm (0.33 in), it is slightly thinner than the Galaxy Note II, and is also slightly lighter. The LTE and China version of the Galaxy Note 3 (N9005) uses a 2.3 GHz quad-core Snapdragon 800 chip, while the international GSM-only model (N9000) uses an octa-core Exynos 5420, consisting of four 1.9 GHz Cortex-A15 cores and four 1.3 GHz Cortex-A7 cores. Testing has shown similar performance for both models."[20]". The device also includes 3 GB of RAM, a 5.7-inch 1080p Super AMOLED display, a 13-megapixel rear-facing camera capable of filming videos in 1080p at 60 fps and 4K resolution at 30 fps (capped at 5 minutes), 16, 32 or 64 GB of internal storage, and a 3200 mAh battery.^[3][6][7]
As with other Galaxy Note series devices, the Galaxy Note 3 ships with an S Pen stylus, which has been updated to use a more symmetrical shape.^[3][6][7] The Galaxy Note 3 is also the first smartphone to include support for USB 3.0, which enables faster data transfers and charging when connected to a compatible port.^[8]
The Galaxy Note 3 was first made available in black, white, and pink. In December 2013, Samsung introduced three new color schemes for select markets; black with gold-colored trim, white with rose gold-colored trim, and red with silver-colored trim.

samsung galaxy note 4

The Samsung Galaxy Note 4 features a 2560×1440 Quad HD (QHD) WQ HD Super AMOLED 5.7-inch display with 2.5D damage-resistant Gorilla Glass 4, and provides a pixel density of 515 ppi (pixels-per-inch). The Note 4 comes in two variants, one powered by a 2.7 GHz quad-core Snapdragon 805 chipset with Adreno 420 GPU, the other powered by Samsung’s ARMv8-A Exynos 7 Octa SoC with two clusters of four cores; four Cortex-A57 cores at 1.9 GHz, and four Cortex-A53 cores at 1.3 GHz, which is the same processor cluster sold for the Samsung Galaxy Note 3 in markets that mostly use or only have 3G (Such as HSUPA and HSPA), and/or '2G', such as unaltered GSM and CDMA networks, similar to how the Galaxy Note 3 is sold. The phone has metal edges with a plastic, faux leather back. The China model is TD-LTE and TD-SCDMA Plus Network.
Both devices that use 4G, LTE/LTE-A and Hybrid 4G-LTE Networks are currently only sold in Canada, Australia, U.S, U.K (for some carriers), Sweden, Norway, Denmark, and South Korea, which have widespread 4G LTE Markets, or are solely 4G/LTE/LTE-A dependant such as Canada and Denmark, which do not use any 3G or older networks, except for HSUPA (Used as a fall back network should the signal strength be weak due to being underground or in the middle of a building), as well as HSPA+, which is a 3G network, though considered by some to be the Original 4G.^[2][3][4] The GPU in charge in the Exynos chipset is the Mali-T760.^[5] Both variants come with 3GB of LPDDR3 RAM and 32GB of internal memory.^[6] Samsung touted new S-Pen features including tilt and rotation recognition^[7] but these features are either not implemented or not supported.^[8] The Note 4's back-cover has a strong resemblance to the Note 3, with a faux leather texture (although without the simulated stitching). Note 4 has a new aluminum frame design, bearing resemblance from the Samsung Galaxy Alpha. Criticism has been aimed at the lack of IP67 certification (water and dust resistance), which is present in Samsung's other flagship, the Galaxy S5.
The Note 4 features a USB 2.0 charging port instead of USB 3.0 (as was in the Note 3 and S5), in favor of a new feature called Fast Charge, which Samsung claims can charge the phone from 0% to 50% in about 30 minutes and from 0% to 100% in less than 100 minutes. It features some unique sensors such as a UV sensor and heart-rate monitor, oximeter, among other, more common sensors.
The Note 4 also includes a stylus pen seamlessly incorporated into the design

samsung galaxy note 5

The Galaxy Note 5 adopts a similar design and construction to the Galaxy S6, featuring a unibody metal frame and glass backing, although unlike the standard S6, the back of the device is curved.^[8] It is offered in dark blue, white, gold, and silver color finishes.^[8] The storage slot for the S Pen stylus uses a spring-loaded mechanism to eject the pen.^[9]
The Note 5 features a 5.7-inch 1440p Super AMOLED display with pixel density of approximately 515 ppi.^[10] It is powered by a 64-bit Exynos 7 Octa 7420 system-on-chip, consisting of four 2.1 GHz Cortex-A57 cores, and four 1.5 GHz Cortex-A53 cores, and 4 GB of LPDDR4 RAM.^[11][12] The Galaxy Note 5 is available with either 32 GB or 64 GB of storage (a special "Winter Edition" exclusive to South Korea offers 128 GB storage),^[13] and utilizes a 3020 mAh battery with wireless and fast charging support.^[8] Similarly to the S6, the Note 5 does not offer expandable storage or the ability to remove the battery, unlike its predecessor.^[8] As with the S6, the fingerprint scanner in the home button now uses a touch-based scanning mechanism rather than swipe-based, and the device also supports Samsung Pay.^[8] The 16-megapixel rear-facing camera is identical to the Galaxy S6, with a f/1.9 aperture, optical image stabilization, object tracking autofocus, and real-time HDR.^[14]
The Galaxy Note 5 shipped with Android 5.1 "Lollipop".^[8] The new "Screen off memo" feature allows the phone to be awoken directly to a note screen when the stylus is removed.^[8] The Camera app on the Note 5 also allows public and private livestreaming directly to YouTube, and supports export of RAW images

ios 8

iOS 8 Beta 1 was introduced at the company's Worldwide Developers Conference on June 2, 2014, and it was released to developers later that day. From then until September, new beta versions were seeded to developers typically every two weeks. Each new beta version contained bug fixes and improvements over the previous version.
On September 9, 2014, at their 'Wish We Could Say More' event, Apple introduced the iPhone 6 and 6 Plus, a new mobile payment service called Apple Pay, and the Apple Watch. At their event, Apple also announced that iOS 8 would see a public release on September 17. The Golden Master version was seeded to developers shortly after.^[4][5]
On October 16, 2014 at their "Its Been Way Too Long" event,^[6] Apple introduced the iPad Air 2, iPad mini 3, new Mac mini and the iMac with Retina 5K display. At the event, Apple also announced that iOS 8.1 would see a release of October 20. iOS 8.1 saw the return of the camera roll album, the introduction of Apple Pay and bug fixes.^[7]
On March 9, 2015 at their "Spring Forward" event, Apple announced iOS 8.2, which includes support for the Apple Watch. It was released to the public within a few hours.
On March 12, 2015, Apple seeded iOS 8.3 beta 3 to developers. A new iOS public beta program was also announced, allowing members of the public to download and test the iOS 8.3 beta.
On June 30, 2015, Apple released iOS 8.4 to the public. iOS 8.4 comes preloaded with the new Music app that contains both Apple Music and Beats 1, Apple's worldwide radio station.
On August 13, 2015, Apple released iOS 8.4.1 to the public. iOS 8.4.1 is the final version of iOS 8

i phone 6s

The iPhone 6S and iPhone 6S Plus (stylized as iPhone 6s and iPhone 6s Plus) are smartphones designed by Apple Inc. The devices were announced on September 9, 2015, at the Bill Graham Civic Auditorium in San Francisco by Apple Inc. CEO Tim Cook. The iPhone 6S and iPhone 6S Plus jointly serve as successors to the iPhone 6 and iPhone 6 Plus of 2014 and are the current flagship devices of the iPhone series.^[14]
The iPhone 6S and iPhone 6S Plus are the performance versions over their respective predecessors, featuring improved hardware specifications, including 3D Touch, a force-sensitive touchscreen; upgraded rear-facing and front-facing cameras; a faster processor; a new chassis made of a stronger 7000 series aluminum alloy;^[15] second-generation fingerprint recognition Touch ID; improved LTE and Wi-Fi connectivity; and a new rose gold finish in addition to the space gray, silver, and gold finishes found on the previous models, while maintaining an identical design. The devices ship with iOS 9 preinstalled.
The iPhone 6S and 6S Plus set a new first-weekend sales record, selling 13 million models, up from 10 million for the iPhone 6 and 6 Plus in the previous year.^[16]
Before the official unveiling, images of the iPhone 6S were leaked online. Although unofficial, the leaks confirmed several of the phone's features. Some of these leaked features included the iPhone 6S model that has 16 gigabyte storage, a new near-field communication processor, the new rose gold color, and fewer chips compared to the older models of the iPhone

i phone 6 plus

The iPhone 6 Plus is the larger of the two phones in Apple's 2014 refresh of iPhones. It was announced alongside the iPhone 6 and Apple Watch (Watch) on September 9th, 2014 at Cupertino. On release date, it will run the iOS 8 operating system and feature an improved camera with Time-Lapse, slower high-speed video capture (up to 240 fps) and support Apple's new Apple Pay (Pay) NFC payment technology. The iPhone 6 Plus uses the Apple A8 chip alongside the M8 co-processor and is also a 64-bit architecture mobile phone.
It weighs 172 grams and has an aluminium body. The size of the phone is 5.5 inches and has a resolution of 1080 × 1920 which Apple calls "Retina HD Display". It sports an 8 MegaPixel iSight Camera with the aperture of F2.2. Additionally, the 6 Plus has a Dual LED flash and Optical Image Stabilisation.
The Apple iPhone 6 Plus has storage options up to a whopping 128 gigabytes! Another great and extremely handy feature is the UMA which means having the ability to call over Wi-Fi! It also has a barometer.

Price	$299
Released	September 19, 2014
Features	Apple Pay, Landscape Mode, Time-lapse, Fingerprint ID.
Operating System	iOS 8
Screen Resolution	5.5 in (140 mm) widescreen Retina display
Colors	Silver, Gold and Space Grey.
Dimensions	Height: 158.1 mm (6.22 in) Width: 77.8 mm (3.06 in) Diagonal: 7.1 mm (0.28 in)
Weight	172 g (6.1 oz)
Homepage	{{{homepage}}}

 

i phone 5c

The iPhone 5C (marketed with a stylized lowercase 'c' as iPhone 5c) is a smartphone designed and marketed by Apple Inc. The device was part of the iPhone series and was unveiled on September 10, 2013,^[3][4] and released on September 20, 2013,^[5][6] along with its higher-end counterpart, the iPhone 5S.
The iPhone 5C lacks several major new features introduced in the iPhone 5S; the 5C uses the A6 chip instead of the A7 with motion co-processor, does not include Touch ID, does not support OpenGL ES 3.0, and lacked the Burst iSight camera mode and slow-motion video recording mode. Instead, the iPhone 5C uses much of the same internal hardware of its predecessor, the iPhone 5. However the iPhone 5C uses a hard-coated polycarbonate casing (eschewing the aluminum used by the iPhone 5), along with a standard black glass front (instead of a white glass front offered on silver and gold iPhone models). Similar to the fifth generation iPod Touch models, the iPhone 5C was available in five colors: blue, green, pink, yellow, and white. It was also the first Apple device to ship with iOS 7, which introduced a revamped visual appearance and other new features. It is also the last iPhone to include the familiar "squircle" icon on the Home button. On September 9, 2014, the 16 and 32 GB iPhone 5C models were discontinued with the announcement of the iPhone 6 and iPhone 6 Plus, and the 16 and 32 GB models were replaced by the 8 GB model. On September 9, 2015, the 8 GB version was discontinued upon the announcement of the iPhone 6S and iPhone 6S Plus.

i phone 5s

The iPhone 5S (marketed with a stylized lowercase 's' as iPhone 5s) is a smartphone designed and marketed by Apple Inc. Part of the iPhone series, the device was unveiled on September 10, 2013 at Apple's Cupertino headquarters. It was released on September 20, 2013 along with its mid-range counterpart, the iPhone 5C.^[12]

The iPhone's SIM card tray is made by Aluminium and it is an Nano-Sim Tray.

The iPhone 5S maintains almost the same design to its predecessor, the iPhone 5. A redesigned home button with Touch ID, a fingerprint recognition system which can be used to unlock the phone and authenticate App Store and iTunes Store purchases, has been introduced. The camera has been updated with a larger aperture and a dual-LED flash optimized for different color temperatures. It also introduced the A7 dual-core processor, which the company proclaimed to be the first 64-bit processor to be used on a smartphone, accompanied by the M7 "motion co-processor". Unlike previous models, the iPhone 5S shipped in a white/gold color scheme in addition to white/silver and gray/black.
The iPhone 5S was the first Apple device to ship with iOS 7, which introduced a revamped visual appearance and other new features. Designed by Jonathan Ive, iOS 7 departs from skeuomorphic elements used by previous versions of iOS in favor of a flat, colorful design. Among new software features introduced to the iPhone 5S include AirDrop, an ad-hoc Wi-Fi sharing platform, Control Center, a control panel containing a number of commonly used functions, and iTunes Radio, an internet radio service. Earphones known as EarPods are included with the iPhone 5S. Apple has released accessories including a case and a dock for the iPhone 5S.
Reception towards the device was generally positive, with some outlets considering it to be best smartphone available on the market due to its upgraded hardware, Touch ID, and other changes introduced by iOS 7.^[13] However, others criticized the iPhone 5S for being too similar to its predecessors,^[14] while others expressed security concerns about the Touch ID system.^[15] Nine million units of the iPhone 5S and iPhone 5C were sold on their weekend of release, breaking Apple's sales record for iPhones.^[16] The iPhone 5S was the best selling phone on all major U.S. carriers in September 2013.^[17]
The iPhone 5S was succeeded as Apple's flagship smartphone by the larger iPhone 6. On March 21, 2016, the 5S received a direct replacement with the announcement of the iPhone SE, which incorporates internal hardware similar to the iPhone 6S, but retains the smaller form factor and design of the 5S

i phone 5

The iPhone 5 is a smartphone that was designed and marketed by Apple Inc. It is the sixth generation of the iPhone, succeeding the iPhone 4S and preceding the iPhone 5S and iPhone 5C. Formally unveiled as part of a press event on September 12, 2012, it was released on September 21, 2012.^[12] It was the first iPhone to be completely developed under the guidance of Tim Cook.
The iPhone 5 featured major design changes in comparison to its predecessor. These included an aluminum-based body which was thinner and lighter than previous models, a taller screen with a nearly 16:9 aspect ratio, the Apple A6 system-on-chip, LTE support, and Lightning, a new compact dock connector which replaced the 30-pin design used by previous iPhone models. This was the second Apple phone to include its new Sony made 8MP Camera, first introduced on the iPhone 4S.
Apple began taking pre-orders on September 14, 2012,^[2] and over two million were received within 24 hours.^[6] Initial demand for the iPhone 5 exceeded the supply available at launch on September 21, 2012, and was described by Apple as "extraordinary", with pre-orders having sold twenty times faster than its predecessors. While reception to the iPhone 5 was generally positive, consumers and reviewers noted hardware issues, such as an unintended purple hue in photos taken, and the phone's coating being prone to chipping. Reception was also mixed over Apple's decision to switch to a different dock connector design, as the change affected iPhone 5's compatibility with accessories that were otherwise compatible with previous iterations of the line.
The iPhone 5 was officially discontinued by Apple on September 10, 2013 with the announcement of its successors, the iPhone 5S and the iPhone 5C.^[13] The iPhone 5 had the shortest lifespan of any iPhone ever produced with only twelve months in production.

i phone 3

The iPhone 3G came preloaded with the latest version of iPhone OS, and continued to receive updates to its software for over two years, with major iterations released on an annual basis. However, the phone had access to a decreasing proportion of new features with each update as its hardware became superseded by later models.
At launch in July 2008, the iPhone 3G came preloaded with iPhone OS 2.0. This introduced the App Store, Microsoft Exchange ActiveSync support, Apple’s MobileMe service, and push email support, along with other new features and bug fixes.
In June 2009, iPhone 3G users 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.
In June 2010, Apple released the iOS 4.0 software update. Unlike its successor models, the iPhone 3G does not support important features of iOS 4.0 such as multitasking, the ability to set a home screen wallpaper, or Bluetooth keyboard support. However, it does provide access to a unified mailbox feature, homescreen folders to better organize apps, playlist creation, and other enhancements. This update was widely criticized for slow performance on iPhone 3G, though September 2010's iOS 4.1 release improved this problem. However, unlike more modern iOS devices, this update again does not provide iPhone 3G owners with access to important features, in this case the Game Center application.^[14]
On November 22, 2010, the iPhone 3G received the iOS 4.2 software update, which introduced features such as YouTube voting, and security fixes. However, the iPhone 3G is unable to use many features included in this update, such as AirPlay and Safari Text Search.
The last release of iOS to support the 3G model is 4.2.1, released on November 22, 2010. iOS 4.3, released on March 11, 2011, does not support the iPhone 3G, with Apple discontinuing further updates, due to hardware limitations and performance issues.^[15]

i phone 4s

The iPhone 4S (retroactively stylized with a lowercase 's' as iPhone 4s as of September 2013^[8]) is a smartphone that was designed and marketed by Apple Inc. It is the fifth generation of the iPhone,^[9] succeeding the iPhone 4 and preceding the iPhone 5. Announced on October 4, 2011 at Apple's Cupertino campus,^[10] its media coverage was accompanied by the death of former Apple CEO and co-founder Steve Jobs on the following day.
Available for pre-order on October 7, 2011 and coming to mainstream availability in retail stores on October 14, 2011 in the United States, Australia, Canada, the United Kingdom, France, Germany, and Japan, sales peaked over its predecessor with over a million sales in the first twenty-four hours of preorder availability and over four million sales in the first four days of retail availability. Further worldwide rollout, including 22 additional countries on October 28, came over the next several months.^[11]
This iPhone was named "4S" where "S" stood for Siri (Apple CEO Tim Cook confirmed that during the Q&A session at the D10 conference in May 2012^[12][13]), an iPhone 4S-exclusive intelligent personal assistant that was later included in future generations of mobile Apple products. Retaining the most of the external design of the iPhone 4, the 4S hosted revised hardware specifications, most notably an upgrade to the Apple A5 chipset, and an 8-megapixel camera with 1080p video recording. It debuted with iOS 5, the fifth major version of iOS, Apple's mobile operating system, that introduced features including iCloud, iMessage, Notification Center, Reminders, and Twitter integration.
Reception to the iPhone 4S was generally favorable. Reviewers noted Siri, the new camera, and processing speeds as significant advantages over the prior model.^[14][15][16] It was succeeded by the iPhone 5 as Apple's flagship phone on September 12, 2012. The iPhone 4S remained in production, albeit being sold with reduced storage (from 16/32/64 GB down to 8 GB.) It was officially discontinued on September 9, 2014, following the announcement of the iPhone 6 but is currently supported as of iOS 9. However iPhone 4S is still being sold in some countries at low prices such as Philippines. During the course of its lifetime, the iPhone 4S is the best-selling iPhone ever produced and it is the first (and, by the time, the only) iPhone to support five major versions of iOS: 5, 6, 7, 8, and 9. It is also the last iPhone to have the original 30 pin connector as it was replaced by the Lightning Connector when the iPhone 5 was released

i phone 4

The iPhone 4 is a smartphone that was designed and marketed by Apple Inc. Following a number of notable leaks, the iPhone 4 was first unveiled on June 7, 2010, at Apple's Worldwide Developers Conference in San Francisco,^[6] and was released on June 24, 2010, in the United States, United Kingdom, France, Germany and Japan. It is the 4th generation of iPhone, succeeding the 3GS and preceding the very similar 4S.
The iPhone 4 introduced a new hardware design to the iPhone line, which Apple's CEO Steve Jobs touted as the thinnest smartphone in the world at the time; it consisted of an uninsulated stainless steel frame which doubles as an antenna, with internal components situated between chemically strengthened aluminosilicate glass.^[7] The iPhone 4 also introduced Apple's new high-resolution "Retina Display"; while maintaining the same physical size and aspect ratio as its precursors, its liquid crystal display had a pixel density of 326 pixels per inch. The iPhone 4 also introduced Apple's A4 system-on-chip, along with iOS 4—which notably introduced multitasking functionality and Apple's new FaceTime video chat service. The iPhone 4 was also the first iPhone to include a front-facing camera, and the first to be released in a version for CDMA networks, ending AT&T's period as the exclusive carrier of iPhone products in the United States.
It was succeeded as Apple's flagship smartphone in 2011 by the iPhone 4S; however, the 4 continued in production until 2013.
The iPhone 4 received generally positive reception, with critics praising its revamped design and more powerful hardware in comparison to previous models. While it was a market success, with over 600,000 pre-orders within 24 hours, the release of the iPhone 4 was plagued by highly publicized reports that abnormalities in its new antenna design caused the device to lose its cellular signal if held in the most common and natural way. Most human contact with the phone's outer edge would cause a significant decrease in signal strength.
The iPhone 4 spent the longest time as Apple's flagship iPhone model at fifteen months, and had the longest lifespan of any iPhone ever produced, spanning close to four years and available in some developing countries until early 2014

i phone 6

Since the launch of the original iPhone, the majority of iPhone models have used 3.5-inch displays—which are smaller than screens used by flagship phones from competitors. The last change in size for the iPhone series came with the iPhone 5; the phone and its immediate successors featured a display that was taller, but the same width as prior models, measuring at 4 inches diagonally. Following Apple's loss in smartphone market share to companies producing phones with larger displays, reports as early as January 2014 suggested that Apple was preparing to launch new iPhone models with larger, 4.7-inch and 5.5-inch displays.^[21][22][23] Reports prior to its unveiling also speculated that Apple might use a new iPhone model to introduce a mobile payments platform using near-field communications—a technology that has been incorporated into many Android phones, but has experienced a low adoption rate among users.^[24]
The iPhone 6 and iPhone 6 Plus were officially unveiled during a press event at the Flint Center for Performing Arts in Cupertino, California on September 9, 2014. The event featured other previously rumored product announcements by Apple alongside the new iPhone models, including the Apple Pay mobile payment platform, and the company's entry into the wearable computing market with the Apple Watch smart watch.^[25]
The iPhone 6 and iPhone 6 Plus were unveiled on September 9, 2014 and released on September 19, 2014; pre-orders began on September 12, 2014, with the iPhone 6 starting at US$649 and the iPhone 6 Plus starting at US$749.^[26] In China, where the iPhone 5c and 5s were the first models in the iPhone series to be released in the country on the same day as their international launch, Apple notified local wireless carriers that it would be unable to release the iPhone 6 and iPhone 6 Plus on the 19th because there were "details which are not ready"; local media reported that the devices had not yet been approved by the Ministry of Industry and Information Technology, and earlier in the year, a news report by state broadcaster China Central Television alleged that iPhone devices were a threat to national security because iOS 7's "frequent locations" function could expose "state secrets."^[27][28]
In August 2015 Apple admitted that some iPhone 6 Plus may have faulty cameras that could be causing photos to look blurry and initiated a replacement program.^[29][30][31]
On September 9, 2015 the 128 GB version of both the iPhone 6 and iPhone 6 Plus was discontinued along with the gold version of both phones, the 16 GB and 64 GB versions of the iPhone 6 and iPhone 6 Plus in silver and space gray remain available for sale at a reduced price due to the release of the iPhone 6s and iPhone 6s Plus flagship devices