TheSamsung Galaxy S4 is a series of high-endAndroidsmartphones produced bySamsung Electronics as the fourth smartphone family of theSamsung Galaxy S series and was first shown publicly on March 14, 2013, at Samsung Mobile Unpacked inNew York City. It is the successor to theGalaxy S III, which maintains a similar design, but with upgraded hardware, moresensors, and an increased focus on software features that take advantage of its hardware capabilities—such as the ability to detect when a finger is hovered over the screen, and expandedeye tracking functionality, it was released the previous year.[8][9] A hardware variant of the S4 became the first smartphone to support the emergingLTE Advanced mobile network standard (model numberGT-I9506 andSHV-E330). The T-Mobile version of the Galaxy S4, named the model (SGH-M919), was released the same month. The phone's successor, theGalaxy S5, was released the next year.
The S4 was made available in late April 2013 on 327 carriers in 155 countries.[11] It became Samsung's fastest selling smartphone and eventually Samsung's best-selling smartphone with 20 million sold worldwide in the first two months,[12] and 40 million in the first six months.[13]
The Galaxy S4 uses a refined version of the hardware design introduced by theSamsung Galaxy S III, with a rounded,polycarbonatechassis and a removable rear cover. It is slightly lighter and narrower than the Samsung Galaxy S III, with a length of 136.6 mm (5.38 in), a width of 69.8 mm (2.75 in), and a thickness of 7.9 mm (0.31 in). At the bottom of the device is a microphone and amicro USB port for data connections and charging; it also supportsUSB-OTG andMHL 2.0. Near the top of the device are a front-facing camera, aninfrared transmitter for usage as universalremote control,[15]proximity, andambient light sensors, and anotification LED. In particular, the infrared sensor is used for the device's "Air View" features.[citation needed] Aheadphone jack, secondary microphone andinfrared blaster are located at the top.[16] The S4 is widely available in black and white color finishes; in selected regions, Samsung also introduced versions in red, purple, pink, brown with gold trim, and light pink with gold trim.[17][18][19][20] In late January 2014, Samsung's Russian website briefly listed a black model with aplastic leather backing, similar to theGalaxy Note 3.[21] On 6 February 2014, the Korean LTE-A model got three new colors[22], those colors being Rose Gold White, Rose Gold Black, and Deep Black.[23]
The S4's 5-inch (130 mm)Super AMOLED display with 1080×1920 pixels (1080pFull HD[24]) is larger than the 4.8-inch (120 mm) 720×1280 display of itspredecessor, and also features a brand new "Diamond"PenTile RGBG matrix subpixel arrangement which has a better subpixel fill-rate for any given resolution than the traditional linear RGBG PenTile layout that had been used prior (there's less empty black space between each subpixel). The whole pixel density also increased from 306 to 441 ppi, surfaced withCorningGorilla Glass 3. An addedglove mode option increases touch sensitivity to allow detecting touch input throughgloves. The Galaxy S4 is Samsung's first and one of the earliest mobile phones of all time to feature a 1080p display.[16]
Unlike previous models, the S4 does not containFM radio support, citing the increased use of online media outlets for content consumption on mobile devices.[25]
The camera of the Galaxy S4 uses a 13-megapixelSony Exmor RSIMX135 image sensor[26] (4128×3096), later used on theGalaxy Note 3.
While the front cameras of theGalaxy S3 andGalaxy Note 2, both released in 2012, are only able to capture videos at up to720p HD resolution, the front camera of the Galaxy S4 allows1080pFull HD video recording for the first time in any Samsung mobile phone.[27]
The image sensor of the front camera is aSamsung CMOSS5K6B2.[28]
Galaxy S4 models use one of two processors, depending on the region and network compatibility. The S4 version for North America, most of Europe, parts of Asia, and other countries containsQualcomm'sSnapdragon 600system-on-chip, containing a quad-core 1.9 GHzKrait 300 CPU and anAdreno 320 GPU. The chip also contains a modem which supportsLTE.[31][32] Other models include Samsung'sExynos 5 Octa system-on-chip with aheterogeneousCPU. Theocta-core CPU comprises a 1.6 GHzquad-coreCortex-A15 cluster and a 1.2 GHz quad-coreCortex-A7 cluster.[11][33] The chip can dynamically switch between the two clusters of cores based on CPU usage; the chip switches to the A15 cores when more processing power is needed, and stays on the A7 cores to conserve energy on lighter loads. Only one of the clusters is used at any particular moment, and software sees the processor as a single quad-core CPU.[31][33][34] The SoC also contains anIT tri-corePowerVR SGX 544graphics processing unit (GPU). Regional models of the S4 vary in support for LTE; for Exynos 5-based models, while the E300K/L/S versions support LTE, with the Cortex-A15 also clocked at 1.6 GHz.[35][36][37] the GT-I9500 model does not.[38] The S4 GT-I9505 includes a multiband LTE transceiver.[8]
On 24 June 2013, a variant supportingLTE Advanced (model number GT-I9506 and SHV-E330), the first commercially available device to do so, was announced for South Korea.[39] In December 2013, it was also shipped to Germany asSamsung Galaxy S4 LTE+, but only withTelekom andVodafone branding.[40]It also was equipped with increased processing power by using the sameCPU (Snapdragon 800) andGPU (Adreno 330) hardware as theGalaxy Note 3SM-N9005,[39] although no precluded video recording capabilities beyond 1080p at 30 fps.
The S4 comes with either 16 GB, 32 GB, 64 GB of internal storage, which can be supplemented with up to an additional 64 GB with amicroSD card slot.[41] Unofficially, the S4 microSD card slot supports 128 GB cards as well.[42] The S4 contains a 2600 mAh,NFC-enabled battery.[16]
The S4 used to have Android 4.2.2 and Samsung'sTouchWiz Nature user experience.Head tracking features have been extended on the S4; the new "Smart Scroll" feature can be used to scroll while looking at the screen by slightly tilting head or phone forward or backward,[43] and "Smart Pause" allows the video player to pause videos if the user is not looking at the screen. "Air View" and "Air Gestures" implement gestures and other functionality (such as previewing images or messages) by holding or swiping a hand or finger slightly above the screen, similarly to Samsung's Galaxy Note series, and adds a feature known as "Quick Glance", which uses the proximity sensor to wake the phone so it can display notifications. The "Group Play" feature allowsad hoc sharing of files between Galaxy phones, along with multiplayer games and music streaming between S4 phones. The S4 also introducesKnox in the Android 4.3 update, a suite of features which implements asandbox for enterprise environments that can co-exist with a user's "personal" data. Knox incorporates use of the ARMTrustZone extensions and security enhancements to the Android platform.[44]
The camera app implements numerous new features (some of which were first seen on theGalaxy Camera), including an updated interface, and new modes such as "Drama" (which composes a moving element from multiple shots into a single photo), "Eraser" (which takes multiple shots and allows the user to remove unnecessary elements from a picture), "Dual Shot" (which uses the front-facing camera for apicture-in-picture effect), "Sound and Shot" (which allows the user to record a voice clip alongside a photo), "Animated Photo", and "Story Album" among others. The S4 also supportsHigh Efficiency Video Coding (HEVC), a next-generationvideo codec.[8][9][45] Other new pre-loaded apps include WatchOn (anelectronic program guide that can utilize the S4's infrared transmitter to be aremote control), S Translator, the workout tracker S Health,S Voice Drive, S Memo,TripAdvisor, and anoptical character recognition app.[46] The previous "Hub" apps from past Samsung devices were replaced by a single Samsung Hub app, with access to music, e-books, and games that can be purchased by users.[16] To take the screenshot the user can simply swipe their hand on the screen from one end to other horizontally.[47]
In February 2014, Samsung began rolling out an update toAndroid 4.4.2 "KitKat" for the S4; the update adds user interface tweaks such as a camera shortcut on the corner of the lock screen, options for setting default launcher and text messaging applications, support for printing, and a new location settings menu for tracking and controlling the use of location tracking by apps.[48][49][50] It also makes significant changes to the handling of secondary storage on the device for security reasons; applications' access to the SD card is restricted to designated, app-specific directories only, while full access to internal primary storage is still allowed. Although this behavior has existed since Android 3.0 "Honeycomb",OEMs such as Samsung previously modified their distributions of Android to retain the previous behavior, allowing applications to have unlimited access to SD card contents.[51]
In January 2015, Samsung began rolling out an update to Android5.0.1 "Lollipop" in Russia and India, an update which brings all the features of Lollipop, such as enhanced performance and lockscreen, including a refined interface with a flatter and geometric look, as seen on the Galaxy S5.[52] Samsung paused the rollout soon after, when users reported major bugs. The rollout continued in March 2015 starting with unlocked models in the UK, Nordic and Baltic countries and has since then spread to several other countries.[53][54] US (starting with AT&T and Sprint) and Canadian Galaxy S4 models received Android 5.0.1 Lollipop update in April 2015;[55][56][57] despite this, there is a workaround available via ROMs taken from theGalaxy S6 series that can make upgrading the Galaxy S4 toAndroid 7.0 "Nougat" withSamsung Experience 8.0 possible.[58]
Several different model variants of the S4 are sold, with most variants varying mainly in handling regional network types and bands. To preventgrey market reselling, models of the S4 manufactured after July 2013 implement aregional lockout system in certain regions, requiring that the firstSIM card used on a European and North American model be from a carrier in that region. Samsung stated that the lock would be removed once a local SIM card is used.[59] SIM format for all variants is Micro-SIM, which can have one or two depending on model.
At theGoogle I/O 2013 keynote, Samsung andGoogle revealed that an edition of the U.S. S4 would be released on June 26, 2013 throughGoogle Play, with theHTC One M7,Sony Xperia Z Ultra,Motorola Moto G, andHTC One M8 releasing later on.[82] initially featuring stockAndroid 4.2.2, the phone later updated to 5.0.1, with Samsung provided updates;[83] it has an unlockable bootloader (similar toNexus devices) and supports LTE on AT&T and T-Mobile's networks.[84] The model number is GT-I9505G.[85]
The "S View Cover" accessory contains a window that can be used to display notifications and a clock
At retail, the S4 is bundled with aUSB cable,AC adapter, andin-ear headphones.[16] The "S View Cover" accessory "closes" the phone. When this cover is detected (by ahall effect sensor), the time and battery are displayed in this cover's window area.[86][87]
While some users considered all new Galaxy S4 features innovative and legitimately useful, others called themfeature creep[88] or justgimmicks.[89] Those features are, for example,Smart Pause,Smart Rotation,Smart Scroll,Air View,Air Gesture,Story Album andTemperature and humidity sensors. These features and sensors are available and optionally utilizable for users and software that needs them. Additionally, the Galaxy S4 is equipped with an"easy mode" that hides many features and increases the size of on-screen elements for easier readability for novice mobile phone users.[90][91][92]
The S4 received many positive reviews, though it also received some criticism.
Gareth Beavis ofTechRadar wrote that the phone is a "stunning smartphone that won't let you down". It received praise for its "stunning screen", "superfast processor", and "Great camera", but was criticized foruser interface issues.[93]
ReadWrite's Rowinski described the phone as a "solid" and "first-rate smartphone", but criticised Samsung's use of "bloatware, pre-loaded apps and features that you will likely never use".[94]
TIME's McCraken said the S4 is a smartphone with everything; it has the biggest screen and the most built-in features. He wishes the S4 would mark the end of Samsung's plan to add too many new features with its flagship smartphones.[95]
Technology journalistWalt Mossberg described the S4 as "a good phone, just not a great one". Mossberg wrote: "while I admire some of its features, overall, it isn't a game-changer." He criticized the software as "especially weak" and "often gimmicky, duplicative of standard Android apps, or, in some cases, only intermittently functional." He urged readers to "consider the more polished-looking, and quite capable,HTC One, rather than defaulting to the latest Samsung."[96]
Consumer Reports named the S4 as the top smartphone as of May 2013 due to its screen quality, multitasking support, and built-in IR blaster.[97]
Critics noted that about half of the internal storage on the S4's 16 GB model was taken up by its system software, using 1 GB more than the S III and leaving only 8.5 to 9.15 GB for the storage of other data, including downloaded apps (some of which cannot be moved to the SD card). Samsung initially stated that the space was required for the S4's new features, but following a report regarding the issue on theBBC seriesWatchdog, Samsung stated that it would review the possibility of optimising the S4's operating system to use less local drive space in a future update.[98][99][100] Storage optimizations were brought in an update first released in June 2013, which frees 80 MB of internal storage and restores the ability to move apps to the device's microSD card.[101]
The S4 reached 10 million pre-orders from retailers in the first two weeks after its announcement.[102] In the United States, this prompted Samsung to announce that due to larger than expected demand, the roll out of devices on U.S. carriers Sprint and T-Mobile would be slower than expected.[103]
The S4 sold 4 million in 4 days and 10 million in 27 days making it the then fastest selling smartphone in Samsung's history (this has been eclipsed by theGalaxy S5).[104][105] The Galaxy S III sold 4 million units in 21 days, theGalaxy S II took 55 days and theGalaxy S took 85 days.[106]
Samsung shipped more than 20 million S4 smartphones by June 30, which is around 1.7 times faster than the Galaxy S III.[107]As of October 23, 2013, Samsung has sold over 40 million S4 units six months after release.[108]
A house inHong Kong is alleged to have been set on fire by an S4 in July 2013,[109] followed by a minor burnt S4 inPakistan.[110] A minor fire was also reported inNewbury,United Kingdom in October 2013.[111][112] Some users of the phone have also reported swelling batteries and overheating;[113] Samsung has offered affected customers new batteries free of charge.[114]
On December 2, 2013, Canadian Richard Wygand uploaded a YouTube video describing his phone combusting.[115] The phone was plugged into AC power overnight; he woke up to the smell of smoke and burning matter. In the video, the power cord was shown to be severely burnt and showed warped damage to the power plug. Later in the video, Wygand describes how he attempted to get a replacement:
We have a service provider; it'sRogers here in Canada. Rogers [has] seen it, and they freaked out. They even said, 'You could send it in through us — it'll take three weeks — or just go see Samsung.' The Samsung reps just said that they need video proof, and now we have to call it in. So we're gonna upload this, send it to Samsung. We'll let you know how it goes.
In his second video, uploaded a few days after the first one, Wygand states that in order to receive a replacement phone, Samsung allegedly asked him to sign a legal document requiring him toremove the video, remain silent about the agreement, and surrender any future claims against the company.[116][117] He didn't sign the document, but his frustrations had been expressed in his video. In an interview withMashable, Wygand said that since he posted the second video, Samsung refused to replace his phone for not signing the document and no further response from Samsung was received afterwards. However, an official spokesman from Samsung told Mashable, "Samsung takes the safety and security of our customers very seriously. Our Samsung Canada team is in touch with the customer, and is investigating the issue."[118]
In theUK, companies which sold the S4 have varied in their reactions to claims by worried customers for replacement batteries under theSale of Goods Act.Amazon, for example, have simply refunded part of the purchase price to allow for the cost of a replacement battery.O2 however insist that the complete phone, with the faulty battery, be returned to them so that they in turn can send it toSamsung to consider the claim.
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