/ˈaɪfoʊn/ EYE-fohn) is a line of smartphones designed and marketed by Apple Inc. The iPhone runs Apple's iOS mobile operating system, originally named "iPhone OS". The first iPhone was released on June 29 2007;[1] the most recent iPhone, the 6th-generation iPhone 5, was released on September 21, 2012.[2] The user interface is built around the device's multi-touch screen, including a virtual keyboard rather than a physical one. The iPhone has Wi-Fi and cellular connectivity (2G, 3G and 4G (iPhone 5 only)).An iPhone can shoot video (though this was not a standard feature until the iPhone 3GS), take photos, play music, send and receive email, browse the web, send texts, and receive visual voicemail. Other functions — games, reference, GPS navigation, social networking, etc. — can be enabled by downloading apps; as of 2012, the App Store offered more than 700,000 apps by Apple and third parties.[3]
There are six generations of iPhone models, each accompanied by one of the six major releases of iOS (formerly iPhone OS). The original iPhone was a GSM phone, and established design precedents, such as screen size and button placement, that have persisted through all models. The iPhone 3G added 3G cellular network capabilities and A-GPS location. The iPhone 3GS added a faster processor and a higher-resolution camera that could record video at 480p. The iPhone 4 featured a higher-resolution 960 × 640 "retina display", a higher-resolution rear-facing camera and a lower-resolution front-facing camera for video calling and other apps.[4] The iPhone 4S added an 8-megapixel camera with 1080p video recording, a dual-core processor, and a natural language voice control system called Siri.[5][6][7] iPhone 5 features the new A6 processor, holds a 4-inch Retina display that is larger than its predecessor's 3.5-inch display, and replaces the 30-pin connector with an all-digital Lightning connector.
For some years, Apple and its manufacturing contractor Foxconn have received criticism due to poor working conditions at the assembly plant in China.
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