iPhone 4 is a smartphone designed and marketed by Apple Inc. Following a number of important leaks, the iPhone 4 was first launched on June 7, 2010, at the Apple Worldwide Developers Conference in San Francisco, and was released on June 24, 2010, in the United States, Britain, France, Germany and Japan. This is the fourth generation iPhone, replacing the 3GS and preceding the 4S.
IPhone 4 introduced a new hardware design for the iPhone family, in which Apple CEO Steve Jobs was mentioned as the world's thinnest smartphone at the time; it consists of a stainless steel frame that acts as an antenna, with internal components situated between aluminosilicate glass. The iPhone 4 also introduces Apple's new high-resolution "Retina Display" with a pixel density of 326 pixels per inch while maintaining the same physical size and aspect ratio as its predecessor. The iPhone 4 also introduces the Apple A4-on-chip system, along with iOS 4 - which introduces new multitasking functionality and FaceTime video chat services from Apple. The iPhone 4 is also the first iPhone to include a front camera, and the first one will be released in version for CDMA network, ending the AT & amp; T as the exclusive carrier of iPhone products in the United States.
The iPhone 4 generally receives a positive reception, with critics praising the revamped design and stronger hardware compared to previous models. While it is a market success, with more than 600,000 pre-orders within 24 hours, the iPhone 4 release is plagued by a large published report that abnormalities in the design of its new antenna cause the device to lose its cellular signal if it is held in a certain way.. Most human contact with the outer edge of the phone will cause a significant reduction in signal strength.
IPhone 4 spent the longest time as Apple's flagship iPhone model in fifteen months, and has the longest lifetime of any iPhone ever produced, spanning nearly four years and available in some developing countries until early 2015. Despite the successful 4S announced in October 2011 , 4 continues to be sold as a midrange model until September 2012, and as an entry-level offer in Apple's lineup until September 2013 with the announcement of the iPhone 5S/iPhone 5C.
Video IPhone 4
Histori
Prototip
Prior to the official launch of iPhone 4 on June 7, 2010, two prototypes were brought to the media's attention, breaking the normally secret development process. Much speculation about the technical specifications proved to be accurate.
Engadget is leaked
On January 27, 2010, Engadget gadget site received a leaked image of an unreleased iPad. Unknown to the editors and readers of these images contain two of the iPhone 4 that have never been released. Not until the next Gizmodo release they realize the full content of the image.
Gizmodo is leaked
On April 19th, 2010, Gizmodo gadget site reported that they have purchased a prototype iPhone for $ 5000, and furthermore, has unloaded the device product. The prototype was reported to have been lost by Apple employees, Gray Powell, in Redwood City, California. Shortly after Gizmodo published detailed information about the prototype, Apple's legal association officially requested the phone to be returned to Apple, and Gizmodo responded with the intention to cooperate.
On April 23, officers from the California Rapid Enforcement Team (REACT) Task Team of the HTTAP Program raided the home of Jason Chen, Gizmodo's editor responsible for reviewing the prototype, confiscating all his computers and hard drives. The Electronic Frontier Foundation criticized the attack as a breach of journalistic protection legislation prohibiting the confiscation of journalist computers and suspicions that Apple has used its influence as a steering committee member charged with the direction and oversight of California's REACT power assignment to encourage the police to act in a way that it usually does will be done for this type of incident. Apple has received an iPhone prototype before the attack when returned by Gizmodo. The District Prosecutor has declared that the investigation has been suspended, and the search is stopped through the items of the Gizmodo editor when they determine whether the shield law applies, and warns that no fees are incurred at this time.
Taoviet leak
Images and videos of the second prototype were published on the Vietnamese website Taoviet on May 12, 2010. That's almost identical to the first, and uses the A4 chip produced by Apple. Web site purchased prototype for $ 4,000. DigiTimes reports that the new phone screen resolution is 960-by-640, which Apple confirmed on the official iPhone 4 announcement.
Release
The iPhone 4 is available for pre-order on June 15, 2010. Customers who are trying to pre-order iPhone 4 reported problems with pre-order processes in US and UK online Apple Stores that crashed due to traffic spikes. The same problem is reported with AT & amp; T and SoftBank, Apple's exclusive partners in the United States and Japan, which delayed iPhone 4's advance sales as demand threatened to exceed supply. Retail stores also can not complete pre-order transactions because the server is damaged.
Apple and its partner operators receive 600,000 pre-orders for iPhone 4 within the first 24 hours, Apple's largest pre-order quantity received in one day for any device up to that point. Engadget reports that at 20:30 UTC, all iPhone 4 preorder suppliers are sold out. 1.7 million iPhone 4s were sold in the first three days of availability.
The iPhone 4 has also been released via Orange in Tunisia and is available in eight cities at launch. As of July 30, 2010, iPhone 4 is made available for sale in Australia, New Zealand and 15 other countries with free bumper cases. In South Korea, it was released by KT on September 10th. In Israel, it was released as well, on September 24th, via Cellcom, Pelephone and Orange. Launched in Thailand on September 23 by AIS, DTAC and True Move, and in Malaysia on September 26 in Kuala Lumpur, and nationally on September 27, according to Maxis website.
The iPhone 4 was released in South Africa on Sept. 22 on the Vodacom and MTN networks, in very limited numbers. The iPhone 4 was launched in Vietnam on September 30 in VinaPhone and Viettel, initially in 3 major cities: Hanoi, Ho Chi Minh City and Da Nang, and then across the country in late October.
The iPhone 4 was launched in India on May 27, 2011 by Aircel and Airtel.
On January 11, 2011, Verizon Wireless announced during a media event that they have reached an agreement with Apple and will begin selling iPhone 4 CDMA in the United States, ending Apple's exclusivity agreement with AT & amp; T. The Verizon iPhone goes on sale on February 10th and pre order begins on February 3rd. The Verizon iPhone includes a 'Private Hotspot' feature that allows users to use the iPhone as a wireless hotspot, with up to five connected devices at a time. February 3, 2011, presale iPhone 4 broke Verizon's first day of sales record for one device.
On June 24, 2010, Apple issued a statement that white iPhone 4 models proved more "challenging to produce" than expected, and initially pushed the release date back into the second half of July. There is a lot of speculation around the delay of white iPhone 4. Among the most popular rumors are those concerning the internal camera of the phone that is affected by the leakage of inner light due to semi-transparent glass and white paint. Another source reported that the problem was related to Apple's inability to match the white color of the front face plate with the home button. On April 27, 2011 Apple announced that it would release its white iPhone 4 model which on April 28, 2011, for GSM and CDMA. The release of the iPhone 4 white was done on April 28th.
During the official opening of the Apple iPhone 4S on October 4, 2011, it was announced that Sprint would start carrying the configured iPhone 4 CDMA and iPhone 4S in the US on October 14th.
Termination
In September 2013, after the release of iPhone 5S and iPhone 5C, Apple stopped selling iPhone 4 in most of their stores as well as on their website. It was replaced by 8 GB iPhone 4S.
Maps IPhone 4
Hardware
Views
The iPhone 4 screen is produced by LG under an exclusive contract with Apple. It features a LED backlit TFT LCD capacitive touchscreen with a pixel density of 326 pixels per inch (ppi) on a 3.5 inch (8.9 cm) screen (measured diagonally), 960 × 640. Each pixel has a width of 78 micrometers. The screen has a contrast ratio of 800: 1. The screen is marketed by Apple as a "Retina display", based on the statement that a display of about 300 ppi at a distance of 305 millimeters (12 inches) from a person's eye, or 57 seconds arc per pixel is the maximum amount of detail that the human retina can feel. With the iPhone expected to be used at a distance of about 12 inches from the eye, a higher resolution would be expected to have no effect on clear image quality because the maximum potential of the human eye has been met.
This claim has been disputed. Raymond Soneira, president of DisplayMate Technologies, said in an interview with Wired magazine that Jobs's claims were exaggerated: "It's close enough to be the perfect look, but Steve pushed it a bit too far". Soneira stated that the human retinal resolution is higher than that claimed by Apple, working up to 477 ppi at 12 inches (305 mm) from the eye, or 36 seconds arc per pixel.
However, Phil Plait, author of Bad Astronomy, whose career includes a collaboration with NASA on cameras at the Hubble Space Telescope, responds to criticism by stating that "if you have [better than 20/20" Sighted, then on one foot away iPhone 4 pixel resolved. The image will look more shiny. If you have average eyesight, the image will look just fine. "
Camera
The iPhone 4 is equipped with an additional front-facing VGA camera, and a rear-facing 5 megapixel rear camera with 3.85 mm f/2.8 [1] lens and an LED flash. The rear facing camera is capable of recording HD video in 720p at 30 frames per second. Both cameras use the tap to focus feature, part of iOS 4, to record photos and videos. The rear-facing camera has a digital zoom of 5ÃÆ'â € ". In 2012 Will.i.am acquired a license from Apple to market the i.am camera for iPhone 4. He said, "This turns the eight megapixel iPhone camera into a 14-megapixel camera.We have better sensors and flash. phone to our device and turn your smartphone into a genius phone.We take over the camera. "
Connectivity
In contrast to Steve Jobs's announcement at WWDC 2010, the Federal Communications Commission's recent documentation has shown that the iPhone 4 contains a UMTS penta-band 3G antenna, not a 3G UMTS quad-band radio, as advertised by Apple. According to the FCC documentation filed by Apple, the radio inside the iPhone 4 supports 800, 850, 900, 1,900, and 2,100 MHz. The 800 MHz frequency, most commonly used on Japanese mobile phones, is not advertised as being supported by Apple. However, the 800 MHz band is part of the 850 MHz band, which might explain why this device is advertised as a quad-band. Chip-set is manufactured by Skyworks Solutions and Infineon for GSM versions.
Like most Apple mobile phone products at the time, iPhone 4 also uses a 30 pin dock connector as the only external data port.
IPhone 4 is the first generation iPhone that has a second microphone used for noise cancellation. It is located at the top of the unit near the headphone jack; the main microphone is on the bottom left.
Gyroscope and accelerometer
The iPhone 4 introduces a gyroscopic sensor that detects 3-axis angle acceleration around the X, Y, and Z axes, allowing proper yaw, pitch, and roll calculations. The gyroscope complements the accelerometer, a sensor that has existed since the original iPhone, which detects device acceleration, vibration, vibration vibration, or falls by detecting linear acceleration along one of three axes (X, Y, and Z). The combined data from accelerometers and gyroscopes provides detailed and precise information about the movement of 6-axis devices in space. 3 axis gyroscope combined with 3 axes accelerometer allows the device to recognize approximately how far, fast, and toward which direction it has moved in space.
Processor and memory
The iPhone 4 is powered by an Apple A4 chip, designed by Intrinsity and, like all previous iPhone models, manufactured by Samsung. This on-a-chip system consists of an ARM Cortex-A8 CPU integrated with the PowerVR SGX535 GPU. Apple A4 is also used on the iPad where it clocks at a rated speed of 1 GHz. The clock speed on iPhone 4 has not been disclosed. All previous models of the iPhone have an underclocked CPU, which usually extends battery life and decreases heat dissipation.
The iPhone 4 has 512 MB of DRAM. Additional DRAMs support improved performance and multi-tasking.
Storage and micro-SIM
IPhone 4 uses a micro-SIM card on an iPhone 4 device running on GSM network, positioned in an open bin, located on the right side of the device. On a CDMA network, the phone is connected to a network using an ESN. All previous models have used a regular mini SIM card. Depending on your carrier, the micro-SIM card may not be available to all networks globally. As a technical solution, you can trim the mini-SIM card with a knife or scissor to fit the micro-SIM tray.
As in previous models, all data is stored in flash memory, 8, 16 or 32Ã, GB, and not on the SIM. Unlike the previous generation, storage capacity is not printed on the back of the unit.
Design
The iPhone 4 has a redesigned structure, designed by Jony Ive, a design that will be reused and adapted for iPhone 4S, 5, 5S and SE. Most notably, the rear panel bulge as well as the tape between the front and the back are missing and have been replaced with a flat surface. The redesign reflects the utilitarianism and uniformity of existing Apple products, such as the iPad and iMac. The iPhone 4's overall dimension has been derived from its predecessor.
The high is 115 millimeters (4.5 inches), 58.6 millimeters (2.31 inches), and 9.4 millimeters (0.37 inches) deep, compared to the iPhone 3GS, which is 116 millimeters (4.6 inches) tall, 62 millimeters (2.4 in) wide, and a depth of 12 millimeters (0.47 inches); making iPhone 4 24% thinner than its predecessor, the iPhone 3GS. Steve Jobs claims it as "the slimmest smartphone on the planet." The diminishing size of the device is mainly due to the antenna being placed externally.
The iPhone 4 is structured around a stainless steel frame that wraps around the edges of the phone, functioning both as the main structure for the device and as an iPhone antenna 4. The metal band has two slots on the GSM phone version, one on the lower left, and one at the top (and false gap along the bottom right, to reflect the one mirror on the bottom left) that divides the band into two antenna parts: the left part of the band functions as Bluetooth, Wi-Fi, and GPS antenna, and the right and bottom portions of the band act as antennas for connectivity GSM and UMTS.
On the CDMA version of the phone there are four gaps in the metal band. Two above (on left and right) and two at the bottom. It splits the metal band into four distinct segments, which like the GSM version of the phone, serves as different antennas for connectivity. The top of the band (divided by the left and right slots above) is to connect to the CDMA network. The left side of the metal band is for Bluetooth, Wi-Fi, and GPS like the GSM version. The right side is not an antenna, but it works for the left side mirror and also to make the display similar to the GSM version of the phone.
The internal components are located between two aluminosilicate glass panels, described by Apple as "chemically reinforced to 20 times harder and 30 times harder than plastic," theoretically allowing it to be more scratch resistant and durable than previous models.
In autumn 2010, the pentalobe screws began replacing the Philips screws used in the post-repair units in the US and in the production units in Japan.
Software
The iPhone 4 ships with iOS 4, which is the latest version of Apple's iOS mobile operating system at the time. iOS 4 introduces multitasking systems, allowing applications to remain "suspended" in memory, perform certain operations in the background, and allow users to switch between applications using the on-screen menu. It also introduces FaceTime, which lets users make video calls between iPhone, iPad, iPod Touch and other OS X users.
The iPhone 4 supports up to iOS 7, released in September 2013. Due to the iPhone's relatively iPhone 4 hardware, certain features available on the newer iPhone models are not available on the device; on iOS 7, they include Siri, 3D maps and turn-by-turn navigation, AirDrop, AirPlay mirroring, direct camera filters, panoramic modes and certain visual effects introduced by iOS 7, such as crystal clear interface elements, parallax effects on the home screen, and live wallpaper. While still subject to the same limits, iOS 7.1 does bring a little improvement in performance on the operating system on the iPhone 4. iOS 7, especially iOS 7.1.2, is the latest version of iOS to support iPhone 4. Unlike iPhone 4S, iPhone 4 does not receive updates iOS 8 due to performance issues.
Accessories
Bumper
IPhone 4 Bumper is a rubber and plastic ring that surrounds the edge of iPhone 4, with the aim of protecting the phone. The inside is rubber with an external tape made of plastic. Bumper wraps around the edges of the device that protects the edges, and to a lesser extent, the screen. The bumper does not cover the front or back of the phone, though it slightly raises the iPhone from whatever surface it is occupying.
In addition, plastic bands house the metal buttons for volume control and sleep/wake buttons. The six holes in Bumper allow access to the mute button, dock connector, headphone jack, speakers, and microphone.
Apple updated the bumper with a wider volume switch hole with the release of iPhone 4 for CDMA networks. The updated bumper is also compatible with the iPhone 4S, the next generation iPhone that has the same exterior design and size as the iPhone 4 CDMA.
Reception
Pre-release
Pre-release receipts are generally positive. The announcement includes information not yet covered by Gizmodo. Fox News commented that "seeing it in action is much more informative than staring at Gizmodo's photo of a broken test unit". Rhodri Marsden from The Independent said that "apart from the introduction of face-to-face video calls, it's not a surprising feature," but rather focusing on how the device is "stronger than its predecessor, faster, easier to use and will make previously exhausting tasks look like win ".
CNET reacted to the announcement by explaining how they believed that iMovie for iOS was "the most exciting part of WWDC Keynote this year". The article notes how iPhone 4, unlike today's cameras, can record HD content and then edit it from the same device, labeling it an "actual mobile editing suite".
Reviews
Reviews about the iPhone 4 are generally profitable. Walt Mossberg of The Wall Street Journal calls the device "the best device in its class". Engadget named it "the best smartphone on the market" in June 2010. CNET gave the iPhone 4 ranks 8.6 out of 10, one of the highest ratings it gave on any smartphone. TechRadar gives 4.5/5 star device. Consumer Reports says signal problems are the reason they do not rate it as a "recommended" model, although other tests place it at the highest rank among smartphones.
Joshua Topolsky from Engadget describes the industrial design of this device as "more detailed and sophisticated" than its predecessor.
Technical issues
Some users report yellow screen changes that disappear after a few days, which is associated with the glass lamination glue used. There is no time to dry completely before the unit reaches the consumer due to the speed of manufacturing. Another problem reported by some users within a few days after the iPhone 4 release is that as long as the distance sensor calls can become insensitive, so contact with the touch screen can end calls, mute calls, and dial other numbers. Some users report that, especially in low light conditions, photos taken on iPhone 4 sometimes contain blue or green "spots." Problems with white balance are also found, especially when using the flash.
Antenna
Shortly after the iPhone 4 was launched, some consumers reported that the phone's signal strength decreased as it touched the lower left edge of the phone, bridging one of two locations separating the two antennas, resulting in lower calls in some areas. signal reception. In response, Apple issued a statement advising that customers should "avoid holding [phone] in the lower left corner" when making or receiving calls.
As a consequence of this issue, it was reported on July 2, 2010 that some iPhone 4 users are planning to sue Apple and AT & T for fraud by concealment, negligence, deliberate misstatement and faulty design. The legal challenge was initiated by a law firm, which created a website to recruit iPhone 4 shoppers who were disappointed at the lawsuit against Apple. Later in the day, Apple issued another statement stating that it had found the cause of a "dramatic drop in the bar".
Apple explains how the formula used to calculate the number of bars displayed is "wrong". Apple promises to fix this problem and release a software update within a few weeks that will address the "errors", which have existed since the original iPhone. The New York Times commented that "the failure to detect this old problem beforehand is very astounding."
Consumer Reports initially stated that the iPhone 4 signal problem is not "unique, and possibly not serious" and continues to mention that signal loss is a problem faced by the entire smartphone industry. It's been a problem that Apple made a formal apology. The next day, the magazine changed their stance after facing the example of a dropped call. The magazine rejected Apple's explanation after conducting tests in a controlled environment, and compared the results with previous generations of the iPhone. Sarkastically pointed out that using tape to cover the bottom left antenna gap is one way to fix the problem, but suggests that consumers who "want a well-functioning iPhone without masking-tape repair" buy the iPhone 3GS instead. The magazine also tested the iPhone 4 while wearing Bumper , a frame-like closure sold by Apple that prevents direct contact with the antenna, reporting that it solves the problem. CNN repeats the Consumer Reports statement that a small amount of latch has proven to be effective in fixing iPhone 4 call issues.
On July 16, 2010, at a press conference, Steve Jobs announced that Apple will provide all iPhone 4 owners with a free case to help solve antenna problems and refunds to users who have purchased Bumper. The free case offer will apply until September 30, 2010, when Apple will re-evaluate the situation. To get a free case, the owner can apply via an app installed on the phone found on the App Store from July 22, 2010 to September 30, 2010. Jobs also announced that Apple can not produce enough Bumper for all phone owners. , but the source of supply and offers a variety of cases. In addition, Jobs cites figures from AppleCare that show 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 is 1.7 percent - 4.3 percentage points less of the number of iPhone 3GS models returned in the first month of mobile launch.
Consumer Reports notes that the solution is not permanent, although the first step is good. However, since Jobs did not set a deadline for fixing the problem, and bidding for free is just a temporary solution, PC World decided to remove iPhone 4 from its "Top 10 Mobile Phones" "chart and redefine it to rank delayed.
AnandTech examines the iPhone 4 antenna and identifies that its outer construction provides better sensitivity of 5-9Ã, dB (6.9-9 times) compared to the general internal antenna design of the iPhone 3GS (fixed phone works with signals as low as -120/121Ã, dB compared up to -113/115dB).
Despite negative media concerns about the antenna problem, 72% of iPhone 4 users said they were "very satisfied" with their iPhone 4 according to a August 2010 survey by ChangeWave Research. The iPhone 4 model goes on sale unchanged until September 2013.
iPhone in space
In 2011, two iPhone 4 units equipped with a special app were taken to the International Space Station above Space Shuttle on the STS-135 mission. The device was used in a variety of experiments, utilizing sensors and special applications.
Timeline for iPhone model
See also
- Smartphones comparison
- List of iOS devices
Note
References
External links
- Official website
Source of the article : Wikipedia
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