IPhone 4S

The **iPhone 4S** is the fifth iPhone that was created by Apple. It is very thin, and has a touchscreen.

It was first available for pre-order on 7 October 2011, and it went on sale on 14 October 2011 in the United States, Australia, Canada, the United Kingdom, France, Germany, and Japan. It was made available in more countries over the next few months.

The iPhone 4S had the same design as the iPhone 4, but has several new features such as an upgrade to the Apple A5 processor, and an 8 MP camera with 1080p video recording. It shipped with iOS 5, which is the fifth major version of Apple's mobile operating system, iOS. It had new features such as iCloud, iMessage, Notification Center, Reminders, and integration with Twitter. It also had a voice activation system named Siri that was included in later generations of mobile Apple products.

## Features

The iPhone 4S introduced a new automated voice control system called "Siri". It first operated only on the iPhone 4S. It allows the user to give commands to the iPhone, which Siri can execute and respond to. For example, iPhone commands such as "What is the weather going to be like?" will generate a response such as "The weather is to be cloudy and rainy and drop to 54 degrees today". These commands can vary greatly and control almost every section of the phone. The commands given do not have to be specific and can be used with natural language. Siri makes it is much easier and/or possible for people to use device functions while driving, exercising, or when they have their hands full. It also means people with trouble reading, seeing, or typing can access the phone more easily. It was became the last smaller iPhone to run iOS 9.

## Infobox (information appliance)

- **name**: iPhone 4S
- **logo**: IPhone 4S logo.svg
- **image**: iPhone 4S No shadow.png
- **manufacturer**: Apple Inc.
- **unitssold**: Four million in first three days of initial sales (October 14–17, 2011)
- **os**: **Original:** iOS 5, iOS 5.0
**Current:** iOS, iOS 9.3.6, released
- **soc**: Dual-core Apple A5
- **cpu**: 800 MHz multi-core processor, dual-core ARM Cortex-A9
- **storage**: 8, 16, 32, or 64 GB (16, 32, and 64 GB discontinued 2013; 8 GB introduced 2013)
- **memory**: 512 MB DDR2 RAM
- **display**: diagonal 3:2 aspect ratio widescreen
LED backlit TFT LCD#In-plane switching, IPS TFT LCD
960×640 image resolution, resolution at 326 pixel density, ppi (0.61 MP)
800:1 contrast ratio (typical)
500 luminance, cd/m<sup>2</sup> max. brightness (typical)
Fingerprint-resistant lipophobicity, oleophobic coating on front and back glass
- **input**: Multi-touch touchscreen display
 Dual microphone
 3-axis gyroscope
 3-axis accelerometer
 Digital data, Digital magnetometer, compass
 Proximity sensor
 photodetector, Ambient light sensor
- **sound**: Single loudspeaker<br/ >3.5 mm TRS connector, TRRS, 20 Hz to 20 kHz frequency response (internal, headset)
3.5mm TRS connector, audio jack
Microphone
- **connectivity**: Wi-Fi (IEEE 802.11, 802.11 IEEE 802.11b-1999, b/IEEE 802.11g-2003, g/IEEE 802.11n-2009, n)
Bluetooth 4.0

**Combined GSM/CDMA antenna:** multi-band, quad-band GSM/General Packet Radio Service, GPRS/Enhanced Data Rates for GSM Evolution, EDGE
(GSM frequency bands, 800 850 900 1,800 1,900 Hertz, MHz)
Quad-band Universal Mobile Telecommunications System, UMTS/High-Speed Downlink Packet Access, HSDPA/High-Speed Uplink Packet Access, HSUPA
(UMTS frequency bands, 800 850 900 1,900 2,100 MHz) (800 MHz unannounced)
multi-band, Dual-band code division multiple access, CDMA/EV-DO Rev. A (800 1,900 MHz)
GLONASS, Global Positioning System (GPS)
- **dimensions**: H
 W
 D
- **predecessor**: iPhone 4
- **successor**: iPhone 5
- **related**: iPhone, iPad (3rd generation), iPod Touch
- **logo size**: 200px
- **image size**: 200px