IPhone 6S - Wikipedia IPhone 6S iPhone 6S iPhone 6S Plus iPhone 6S in Rose Gold Brand Apple Inc. Slogan `` The only thing that 's changed is everything. '' `` One powerful phone '' Generation 9th Model 6S : A1633 ( North America ) A1688 ( International ) A1700 ( China ) 6S Plus : A1634 ( North America ) A1687 ( International ) A1699 ( China ) Compatible networks GSM, CDMA, 3G, EVDO, HSPA+, LTE / 4G, LTE Advanced / 4G+ First released September 25, 2015 ; 2 years ago ( 2015 - 09 - 25 ) Availability by country September 25, 2015 United States Canada United Kingdom France Germany Australia New Zealand China Hong Kong Singapore Japan Puerto Rico October 9, 2015 Andorra Austria Belgium Bosnia Bulgaria Croatia Czech Republic Denmark Estonia Finland Greece Greenland Hungary Iceland Ireland Isle of Man Italy Latvia Liechtenstein Lithuania Luxembourg Maldives Mexico Monaco Netherlands Norway Poland Portugal Romania Russia Slovakia Slovenia Spain Sweden Switzerland Taiwan Pakistan October 10, 2015 Bahrain Jordan Kuwait Qatar Saudi Arabia United Arab Emirates October 16, 2015 Israel India Kazakhstan Macedonia Malaysia Malta Montenegro South Africa Turkey October 23, 2015 Belarus Colombia Guam Maldova Serbia South Korea Ukraine October 30, 2015 Chile Guatemala Thailand November 6, 2015 Mauritius Philippines November 13, 2015 Brazil Costa Rica March 31, 2017 Indonesia Discontinued September 7, 2016 ( 16 and 64 GB ) Units sold 13 million in launch weekend Predecessor iPhone 6 ( Plus ) Successor iPhone 7 ( Plus ) Related iPhone SE Type 6S : Smartphone 6S Plus : Phablet Form factor Slate 6S : 138.3 mm ( 5.44 in ) H 67.1 mm ( 2.64 in ) W 7.1 mm ( 0.28 in ) D 6S Plus : 158.2 mm ( 6.23 in ) H 77.9 mm ( 3.07 in ) W 7.3 mm ( 0.29 in ) D Weight 6S : 143 g ( 5.0 oz ) 6S Plus : 192 g ( 6.8 oz ) Operating system Original : iOS 9.0 Current : iOS 11.4, released May 29, 2018 ( 2018 - 05 - 29 ) System on chip Apple A9 CPU 1.85 GHz dual - core 64 - bit ARMv8 - A `` Twister '' GPU PowerVR GT7600 ( hexa - core ) Memory 2 GB LPDDR4 RAM Storage 16, 32, 64, or 128 GB SK Hynix TLC NAND connected via NVMe Battery 6S : 3.82 V 6.55 W h ( 1715 mA h ) Li - Po 150 min charge time for an average of 8 h 15 min use 6S Plus : 3.8 V 10.45 W h ( 2750 mA h ) Li - Po 165 min charge time for an average of 9 h 11 min use Display 6S : 4.7 in ( 120 mm ) Retina HD, LED - backlit IPS LCD, 1334 × 750 pixel resolution ( 326 ppi ) with Dual Ion Exchange strengthened glass and 3D Touch 6S Plus : 5.5 in ( 140 mm ) Retina HD, LED - backlit IPS LCD, 1920 × 1080 pixel resolution ( 401 ppi ), 500 cd / m max. brightness ( typical ), with Dual Ion Exchange strengthened glass and 3D Touch Rear camera Sony Exmor RS IMX315 12 MP ( 1.22 μm ), true - tone flash, autofocus, IR filter, burst mode, f / 2.2 aperture, 4K video recording at 30 fps or 1080p at 30 or 60 fps, slow - motion video ( 1080p at 120 fps and 720p at 240 fps ), timelapse with stabilization, panorama ( up to 63 megapixels ), facial recognition, digital image stabilization, optical image stabilization ( 6S Plus only ) Front camera 5 MP, burst mode, f / 2.2 aperture, exposure control, face detection, auto - HDR, 1080p HD video recording, Retina flash Sound Mono speaker, 3.5 mm stereo audio jack Connectivity All models : LTE ( Bands 1 to 5, 7, 8, 12, 13, 17 to 20, 25 to 29 ), TD - LTE ( Bands 38 to 41 ), TD - SCDMA 1900 ( F ), 2000 ( A ), UMTS / HSPA+ / DC - HSDPA ( 850, 900, 1700 / 2100, 1900, 2100 MHz ), CDMA EV - DO Rev. A ( 800, 1700 / 2100, 1900, 2100 MHz ), GSM / EDGE ( 850, 900, 1800, 1900 MHz ), Wi - Fi ( 802.11 a / b / g / n / ac ), Bluetooth 4.2, NFC, GPS, GLONASS, Galileo & QZSS Models A1633 and A1634 : LTE ( Band 30 ) SAR 6S Model A1633, A1688, A1691, A1700 Head : 1.14 W / kg Body : 1.14 W / kg 6S Plus Model A1634, A1687, A1690, A1699 Head : 1.12 W / kg Body : 1.14 W / kg Hearing aid compatibility M3, T4 Website www.apple.com/iphone-6s/ This article is part of a series on the iPhone 1st 3G 3GS 4S 5 5C 5S SE 6 / 6 Plus 6S / 6S Plus 7 / 7 Plus 8 / 8 Plus X List of iPhone models X-ray of the iPhone 6s The iPhone 6S and iPhone 6S Plus ( stylized and marketed as iPhone 6s and iPhone 6s Plus ) are smartphones designed, developed and marketed by Apple Inc. They were announced on September 9, 2015, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, with pre-orders beginning September 12 and official release on September 25, 2015. The iPhone 6S and 6S Plus were succeeded by the iPhone 7 and iPhone 7 Plus in September 2016. The iPhone 6S has a similar design to the iPhone 6 but includes updated hardware, including a strengthened chassis and upgraded system - on - chip, a 12 - megapixel camera, improved fingerprint recognition sensor, LTE Advanced support, and `` Hey Siri '' capabilities without needing to be plugged in. The iPhone 6S also introduces a new hardware feature known as `` 3D Touch '', which enables pressure - sensitive touch inputs. iPhone 6S had a mostly positive reception. While performance and camera quality were praised by most reviewers, the addition of 3D Touch was liked by one critic for the potential of entirely new interface interactions, but disliked by another critic for not providing users with an expected intuitive response before actually using the feature. The battery life was criticized, and one reviewer asserted that the phone 's camera was not significantly better than the rest of the industry. The iPhone 6S set a new first - weekend sales record, selling 13 million models, up from 10 million for the iPhone 6 in the previous year. However, Apple saw its first - ever quarterly year - over-year decline in iPhone sales in the months after the launch, credited to a saturated smartphone market in Apple 's biggest countries and a lack of iPhone purchases in developing countries. Contents 1 History 2 Specifications 2.1 Hardware 2.2 Software 3 Reception 3.1 Sales 4 Hardware issues 4.1 Unexpected battery shutdowns 5 Timeline of models 6 References 7 External links History The Space Gray variant of an iPhone 6s showing its rear aluminum housing identical to iPhone 6. Notice the `` S '' logo which is the main physical difference with the iPhone 6. Before the official unveiling, several aspects of the iPhone 6S were rumored, including the base model having 16 gigabytes of storage, the pressure - sensitive display technology known as 3D Touch, and a new rose gold color option. iPhone 6S and iPhone 6S Plus were officially unveiled on September 9, 2015, during a press event at the Bill Graham Civic Auditorium in San Francisco. Pre-orders began September 12, with the official release on September 25. On September 7, 2016, Apple announced the iPhone 7 and iPhone 7 Plus as successors to the iPhone 6S and 6S Plus. On March 31, 2017, the iPhone 6S and 6S Plus were released in Indonesia alongside the iPhone 7 and 7 Plus, following Apple 's research and development investment in the country. Specifications Hardware The iPhone 6S is nearly identical in design to the iPhone 6. In response to the `` bendgate '' design flaws of the previous model, changes were made to improve the durability of the chassis : the 6S was constructed from a stronger, 7000 series aluminum alloy, `` key points '' in the rear casing were strengthened, and touchscreen integrated circuits were re-located to the display assembly. Alongside the existing gold, silver, and space gray options, a new rose gold color option was also introduced. The iPhone 6S is powered by the Apple A9 system - on - chip, which the company stated is up to 70 % faster than Apple A8, and has up to 90 % better graphics performance. The iPhone 6S has 2 GB of RAM, more than any previous iPhone, and also supports LTE Advanced. The Touch ID sensor on the 6S was also updated, with the new version having improved fingerprint scanning performance over the previous version. While the capacities of their batteries are slightly smaller, Apple rates iPhone 6S and 6S Plus as having the same average battery life as their respective predecessors. The A9 system - on - chip was dual - sourced from TSMC and Samsung. Although it was speculated that the Samsung version had worse battery performance than the TSMC version, multiple independent tests have shown there is no appreciable difference between the two chips. Although the device is not promoted as such, the iPhone 6S has a degree of water resistance because of a change to its internal design, which places a silicone seal around components of the logic board to prevent them from being shorted by accidental exposure to water. Their displays are the same sizes as those of the iPhone 6, coming in 4.7 - inch 750p and 5.5 - inch 1080p ( Plus ) sizes. The iPhone 6S features a technology known as 3D Touch ; sensors are embedded in the screen 's backlight layer that measure the firmness of the user 's touch input by the distance between it and the cover glass, allowing the device to distinguish between normal and more forceful presses. 3D Touch is combined with a Taptic Engine vibrator to provide associated haptic feedback. Although similar, this is distinct from the Force Touch technology used on the Apple Watch and Retina MacBook, as it is more sensitive and can recognize more levels of touch pressure than Force Touch. Due to the hardware needed to implement 3D Touch, the iPhone 6S is heavier than its predecessor. The iPhone 6S features a 12 - megapixel rear - facing camera, an upgrade from the 8 - megapixel unit on previous models, as well as a 5 - megapixel front - facing camera. It can record 4K video, as well as 1080p video at 60 and now 120 frames per second. The camera was well received by many critics of the phone. When the camera takes a 4K video recording it can use the storage on the phone rapidly. The 16 gigabyte version of the phone was only able to hold 40 min of video. The iPhone 6S and 6S Plus were originally offered in models with 16, 64, and 128 GB of internal storage. Following the release of iPhone 7 in September 2016, the 16 and 64 GB models were dropped, and replaced by a new 32 GB option. For improved storage performance, iPhone 6S utilizes NVM Express ( NVMe ), resulting in a maximum average read speed of 1,840 megabytes per second. Software See also : iOS, iOS 9, iOS 10, iOS 11, and iOS 12 The iPhone 6S originally ships with iOS 9 ; the operating system leverages the 3D Touch hardware to allow recognition of new gestures and commands, including `` peeking '' at content with a light touch and `` popping '' it into view by pressing harder, and accessing context menus with links to commonly used functions within apps with harder presses on home screen icons. The camera app 's `` Retina Flash '' feature allows the display 's brightness to be used as a makeshift flash on images taken with the front camera, while `` Live Photos '' captures a short video alongside each photo taken. The iPhone 6s currently supports iOS 11 which was first released September 19, 2017, an Apple announced that the iPhone 6s family will receive the upcoming version of iOS, the iOS 12. Reception Nilay Patel of The Verge described the 6S, in particular the Plus model, as `` right now the best phone on the market. (... ) There just are n't other companies that can roll out a feature like 3D Touch and make it work in a way that suggests the creation of entirely new interface paradigms, and every other phone maker needs to figure out exactly why Apple 's cameras are so consistent before they can really compete. '' Samuel Gibbs of The Guardian commented that the phone `` has the potential to be the best smaller smartphone on the market, but its short battery life is deeply frustrating '' and described the camera as `` not leagues ahead of the competition anymore. '' Tom Salinger of The Register praised performance, noting that `` we 're now using phones with the performance of current PCs '', but described 3D Touch as `` just a glorified vibrator '' and `` no good (... ) you still do n't know quite what 's going to happen until you try it ''. Ryan Smith and Joshua Ho of AnandTech awarded the iPhone 6S and 6S Plus its Editors ' Choice Gold Award, based largely on the phone 's performance and the addition of 3D Touch. Sales On the Monday following the iPhone 6S 's launch weekend, Apple announced that they had sold 13 million models, a record - breaking number that exceeded the 10 million launch sales of the iPhone 6 in 2014. In the months following the launch, Apple saw its first - ever quarterly year - over-year decline in iPhone sales, attributed to a saturated smartphone market in Apple 's biggest sales countries and consumers in developing countries not buying iPhones. Hardware issues Unexpected battery shutdowns In November 2016, Apple announced that a `` very small number '' of iPhone 6S devices manufactured between September and October 2015 have faulty batteries that unexpectedly shut down. While Apple noted that the battery problems were `` not a safety issue '', it announced a battery replacement program for affected devices. Customers with affected devices, which span `` a limited serial number range '', were able to check their device 's serial number on Apple 's website, and, if affected, receive a battery replacement free of charge at Apple Stores or authorized Apple Service Providers. In December 2016, Apple revealed new details about the issue, stating that the affected devices contained a `` battery component that was exposed to controlled ambient air longer than it should have been before being assembled into battery packs ''. The statement also said that customers `` outside of the affected range '' may also experience unexpected shutdowns, though clarifying that some shutdowns can occur under `` normal conditions '' because the iPhone tries to `` protect its electronics ''. Apple also said that an upcoming update to the iOS operating system would include additional diagnostic tools to help Apple find more information about different kinds of battery issues. In February 2017, Apple released a statement to TechCrunch, saying that the iOS 10.2. 1 update, released on January 23, had reduced the occurrence of battery shutdowns by `` more than 80 % '' on iPhone 6S devices. 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External links Wikimedia Commons has media related to iPhone 6s. iPhone 6S / iPhone 6S Plus -- official site Preceded by iPhone 6 / Plus iPhone 6S / Plus 9th generation Succeeded by iPhone 7 / Plus iOS and iOS - based products History Outline Hardware Apple TV 2nd 3rd iPad 1st 3rd 4th Air 1st 2017 2018 iPad Mini 1st iPad Pro 1st 2nd iPhone 1st 3G 3GS 4S 5 5C 5S 6 & 6 Plus 6S & 6S Plus SE 7 & 7 Plus 8 & 8 Plus X iPod Touch 1st 2nd 3rd 4th 5th 6th Software AirDrop AirPlay AirPrint CarPlay Cocoa Touch Control Center Core Animation HomeKit iTunes iOS 5 6 7 8 9 10 11 12 All Night Shift Notification Center SDK Siri Spotlight SpringBoard VoiceOver WebKit Bundled apps Books Calendar Clock Contacts FaceTime Files Find My Friends Find My iPhone Health Home Mail Maps Messages Music News Notes Photos Reminders Safari TV Videos Wallet Weather Watch Measure Discontinued Newsstand Apple apps AirPort Utility Clips iLife GarageBand iMovie iWork Keynote Numbers Pages Logic Remote Remote Discontinued Beats Music Cards iPhoto Nike + iPod Services Apple Pay App Store Game Center iBookstore iCloud iMessage iTunes Connect iTunes Store Multitasking Push Notifications TestFlight Discontinued iAd iTunes Radio MobileMe Other 300 - page bill Apple mobile application processors FairPlay Free and open - source iOS applications Games History of iPhone iFund Jailbreaking Metal Swift WWDC Apple hardware since 1998 Consumer desktop / all - in - ones eMac iMac G3 G4 G5 Intel - based Mac Mini Professional tower / desktop iMac Pro Mac Pro Power Macintosh G3 G4 G4 Cube G5 Xserve Consumer notebook iBook MacBook 12 - inch MacBook Air Professional notebooks MacBook Pro PowerBook G3 G4 Consumer electronics Apple TV 1st 2nd 3rd 4th 4K Apple Watch 1st Series 1 Series 2 Series 3 Displays Thunderbolt Cinema Studio HomePod iPad 1st 3rd 4th Air 1st 2017 2018 iPad Mini 1st iPad Pro 1st 2nd iPod Classic Photo Mini iPod + HP Shuffle Nano Touch Newton MessagePad eMate 300 Smartphones iPhone 1st 3G 3GS 4S 5 5C 5S 6 / 6 Plus 6S / 6S Plus SE 7 / 7 Plus 8 / 8 Plus X Accessories AirPods AirPort Express Extreme Time Capsule AirPower iPad Pencil iPod Click Wheel Hi - Fi Nike+ iSight Keyboard Wireless Magic Mouse USB Pro Wireless Mighty Magic Magic 2 Remote Siri Remote SuperDrive Trackpad Magic Magic 2 USB Modem Xserve RAID Italics indicate current products. See also : Apple hardware before 1998 Apple hardware Apple II family Discontinued Apple I Apple II series II II Plus IIe IIe Card ( Macintosh PDS ) IIc IIc Plus IIGS Apple III Apple Lisa Macintosh XL Mac Desktop Current iMac iMac Pro Mac Pro Mac Mini Discontinued Compact 128K 512K 512Ke Plus SE SE / 30 Classic Classic II Color Classic II series II IIx IIcx IIci IIfx IIsi IIvi IIvx LC family LC LC II LC III LC 475 LC 500 series LC 630 5200 LC Macintosh TV Quadra 600 series 610 650 660AV 605 630 700 900 950 800 840AV Performa Centris Power Macintosh 4400 and 7220 5000 series 5200 LC and 5300 LC 5260 5400 5500 6000 series 6100 6200 and 6300 6400 6500 7000 series 7100 7200 and 8200 7300 7500 7600 8000 series 8100 8500 8600 9000 series 9500 9600 G3 G4 Cube G5 Twentieth Anniversary iMac family G3 G4 G5 eMac Laptop Current MacBook family 12 - inch Air Pro Discontinued Macintosh Portable PowerBook 68k - based 100 series 100 140 170 160 180 150 190 Duo 210 230 500 series PowerPC - based 2300c 5300 1400 3400c 2400c G3 G4 iBook G3 G4 MacBook ( pre-2015 ) Server Discontinued Workgroup Server 9150 Network Server Xserve Mac Mini Server Mac Pro Server Devices Current Apple TV Apple Watch Series 1 Series 3 HomePod iPad iPad ( 2018 ) Mini 4 Pro 10.5 / 12.9 ( 2nd ) iPhone 6S / 6S Plus SE 7 / 7 Plus 8 / 8 Plus X iPod ( Touch ( 6th ) ) Discontinued Interactive Television Box Apple Watch Series 0 Series 2 iPad 1st 3rd 4th Air Air 2 2017 Mini 1st Pro 9.7 / 12.9 ( 1st ) iPhone 1st 3G 3GS 4S 5 5C 5S 6 / 6 Plus iPod Classic iPod + HP U2 Photo with color display Hi - Fi Mini Nano Shuffle Touch 1st 2nd 3rd 4th 5th Newton MessagePad eMate 300 Pippin PowerCD QuickTake Accessories Current AirPods AirPower iPad Pencil Smart Keyboard Magic Keyboard Magic Mouse 2 Magic Trackpad 2 Siri Remote SuperDrive ( USB ) Discontinued Displays III II AppleColor Composite IIe AppleColor High - Resolution RGB Color AudioVision 14 Multiple Scan 14 ColorSync 750 Studio Cinema Thunderbolt Drives Disk II Macintosh ProFile Hard Disk 20 Hard Disk 20SC AppleCD PowerCD Tape Drive 40SC SuperDrive Xserve RAID Input devices Desktop Bus iSight Keyboards Extended Adjustable Wireless Magic Trackpad Mice USB Mouse Pro Mouse Wireless Mouse Mighty Mouse Magic Mouse Remote Scanner iPod Click Wheel Nike + iPod Networking AirPort Express Router Extreme Router Time Capsule Apple II serial cards Modems USB LocalTalk Communication Slot GeoPort Printers Silentype Dot Matrix Printer Letter Quality Printer ImageWriter LaserWriter 410 Color Plotter Color LaserWriter StyleWriter Apple - designed processors Current A series 64 - bit : A8 A9 A10 A10X A11 S series 32 - bit : S1P S3 W series 32 - bit : W1 W2 T series 32 - bit : T1 T2 Discontinued A series 32 - bit : A4 A5 A5X A6 A6X 64 - bit : A7 A8X A9X S series 32 - bit : S1 S2 Italics indicate announced unreleased products Comparison of Macintosh models Timeline of Macintosh models Timeline of Apple Inc. products Apple Inc. 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Question: what is the memory of an iphone 6s
Answer: 2 GB LPDDR4 RAM