According to Jobs in 1998, the 'i' word in 'iMac' (and thereafter 'iPod', 'iPhone' and 'iPad') stands for internet, individual, instruct, inform, and inspire. Apple created the device during a secretive collaboration with Cingular Wireless (later renamed AT&T Mobility) at an estimated development cost of US$150 million over thirty months. Then-Apple CEO Steve Jobs steered the original focus away from a tablet (which was later revisited in the form of the iPad) towards a phone. As of January 2017, Apple's App Store contained more than 2.2 million applications for the iPhone.ĭevelopment of an Apple smartphone began in 2004, when Apple started to gather a team of 1,000 employees led by hardware engineer Tony Fadell, software engineer Scott Forstall, and design officer Jony Ive, to work on the highly confidential 'Project Purple'. The iPhone has been credited with popularizing the smartphone and slate form factor, and with creating a large market for smartphone apps, or ' app economy'.

The first-generation iPhone was described as a 'revolution' for the mobile phone industry and subsequent models have also garnered praise.

The iPhone has generated large profits for Apple, making it one of the world's most valuable publicly traded companies. The iPhone is one of the two largest smartphone platforms in the world alongside Android, and is a large part of the luxury market. Touch ID is still used for the budget iPhone SE series. Since the iPhone X, iPhone models have switched to a nearly bezel-less front screen design with Face ID facial recognition, and app switching activated by gestures. Up to the iPhone 8 and 8 Plus, iPhones had a single button on the front panel with the Touch ID fingerprint sensor. Since the iPhone's launch, it has gained larger screen sizes, video-recording, waterproofing, and many accessibility features. The iPhone was the first mobile phone to use multi-touch technology. As of 2022, the iPhone accounts for 15.6% of global smartphone market share. As of November 1, 2018, more than 2.2 billion iPhones had been sold. Since then, Apple has annually released new iPhone models and iOS updates. The first-generation iPhone was announced by then-Apple CEO Steve Jobs on January 9, 2007. that use Apple's own iOS mobile operating system. IPhone is a line of smartphones produced by Apple Inc.

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