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The iPhone is a line of smartphones designed and marketed by Apple Inc. They run Apple’s iOS mobile operating system, which has been renamed as “iPhoneOS” as of the middle of 2020. The first generation iPhone was released on June 29, 2007, and multiple new hardware iterations with new iOS releases have been released since.

The user interface is built around the device’s multi-touch screen, including a virtual keyboard. The iPhone has Wi-Fi and can connect to cellular networks. 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 and receive text messages, follow GPS navigation, record notes, perform mathematical calculations, and receive visual voicemail.

Other functionality, as determined by Apple, includes social networking, video games, reference works, GPS navigation, and tools for news, health, and fitness. As of January 2017, Apple’s App Store contained more than 2.2 million applications available for the iPhone.

iPhones have played a significant role in the shift towards smartphones with touchscreens, large displays, and internet connectivity becoming key features of phones, rather than just their calling capabilities. The iPhone’s success has been attributed to its ability to serve as a single device for multiple functions, as well as its design, ecosystem of applications, and strong brand.

As of my knowledge cutoff in September 2021, the most recent iPhone models are the iPhone 13 mini, iPhone 13, iPhone 13 Pro, and iPhone 13 Pro Max, announced on September 14, 2021. However, the actual models and specifications may have changed if you’re asking this after my training data.

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