The iPhone is a line of smartphones designed and sold by Apple Inc. that use Apple’s iOS mobile operating system. The first-generation iPhone was announced on January 9, 2007, by then-Apple CEO Steve Jobs. Since then, Apple has released new iPhone models and iOS updates every year. As of November 1, 2018, more than 2.2 billion iPhones have been sold.
The iPhone features a user interface centered around a multi-touch screen. It can connect to cellular networks and Wi-Fi, allowing users to make phone calls, browse the web, take photos, play music, and send or receive emails and text messages. Since the release of the iPhone, additional features have been added, such as larger screen sizes, video recording, water resistance, the ability to install third-party mobile apps through the App Store, and many accessibility features. Up to the iPhone 8 and 8 Plus, iPhones used a single-button layout on the front panel to return users to the home screen. Starting with the iPhone X, iPhone models switched to a nearly bezel-less front screen design, where app switching is activated by gesture recognition.
The iPhone is one of the two major smartphone platforms worldwide, alongside Android, and occupies a large portion of the premium market. The iPhone has brought significant profits to Apple, making it one of the world’s most valuable publicly traded companies. The first-generation iPhone was described as “revolutionary” and a “game changer” for the mobile phone industry, and subsequent models have also received praise. The iPhone is credited with popularizing the smartphone and slate form factor and creating a large market for smartphone apps, known as the “app economy.” As of January 2017, Apple’s App Store had more than 2.2 million applications for the iPhone.
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