iPhone 4S

iPhone 4S
Manufacturer	Apple Inc.
Units sold	Four million in first three days of initial sales (October 14–17, 2011)
Operating system	Original: iOS 5.0; Current: iOS 9.3.6, released June 22, 2019
System-on-chip used	Dual-core Apple A5
CPU	800 MHz dual-core ARM Cortex-A9
Memory	512 MB DDR2 RAM
Storage	8, 16, 32, or 64 GB (16, 32, and 64 GB discontinued 2013; 8 GB introduced 2013)
Display	3.5 in (89 mm) diagonal 3:2 aspect ratio widescreen; LED backlit IPS TFT LCD; 960×640 resolution at 326 ppi (0.61 MP); 800:1 contrast ratio (typical); 500 cd/m2 max. brightness (typical); Fingerprint-resistant oleophobic coating on front and back glass
Sound	Single loudspeaker; 3.5 mm TRRS, 20 Hz to 20 kHz frequency response (internal, headset); 3.5mm audio jack; Microphone
Input	Multi-touch touchscreen display ; Dual microphone ; 3-axis gyroscope ; 3-axis accelerometer ; Digital compass ; Proximity sensor ; Ambient light sensor
Connectivity	Wi-Fi (802.11 b/g/n) (2.4 GHz only); Bluetooth 4.0; Combined GSM/CDMA antenna: quad-band GSM/GPRS/EDGE; (800 850 900 1,800 1,900 MHz); Quad-band UMTS/HSDPA/HSUPA; (800 850 900 1,900 2,100 MHz) (800 MHz unannounced); Dual-band CDMA/EV-DO Rev. A (800 1,900 MHz); GLONASS, Global Positioning System (GPS)
Dimensions	115.2 mm (4.54 in) H; 58.6 mm (2.31 in) W; 9.3 mm (0.37 in) D
Weight	140 g (4.9 oz)
Predecessor	iPhone 4
Successor	iPhone 5
Related articles	iPhone, iPad (3rd generation), iPod Touch
Website	apple.com/iphone-4s/specs/

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 October 7, and it went on sale on October 14 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.^[4] 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.^[5] It also means people with trouble reading, seeing, or typing can access the phone more easily.^[5]

IPhone 4S Media

The "Let's Talk iPhone" event was held at the Apple Campus, instead of the Yerba Buena Center for the Arts, where most non-WWDC events are held.
The iPhone 4s setup screen – it is the first iPhone that does not need to connect to iTunes in order to be activated because iOS 5 introduces features such as iCloud.
The iPhone 4s features a Sony 8-megapixel camera and 1080p video recording.
Apple A5 chip used in the iPhone 4s
The iPhone 4s uses the same proprietary 30-pin dock connector that is used on the iPhone 4, which was first introduced in the 3rd generation iPod.
There is a line on top of the earpiece of a white iPhone 4s that is the proximity sensor. This is included on the black model as well, but is less visible.
An iPhone 4s with a cracked rear cover. The glass rear covers on the iPhone 4s (along with the iPhone 4) were notorious for cracking easily after an accidental fall. A similar design (glass body with stainless-steel frame) was later reused with the introduction of the iPhone X and iPhone 8, although this second iteration of the glass-back design was for wireless charging.