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 I Phone 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 functions (video games, reference works, social networking, etc.) can be enabled by downloading mobile apps. As of June 2016, Apple's App Store contained more than 2 million applications available for the iPhone.
The iPhone's commercial success has been credited with reshaping the smartphone industry and helping to make Apple one of the world's most valuable publicly traded companies by 2011. The original iPhone was one of the first phones to use a design featuring a slate format with a touchscreen interface. Almost all modern smartphones have replicated this style of design
Development of what was to become the iPhone began in 2004, when Apple started to gather a team of 1,000 employees to work on the highly confidential "Project Purple", including Jonathan Ive, the designer behind the iMac and iPod. Apple CEO Steve Jobs steered the original focus away from a tablet, like the iPad, and towards a phone. Apple created the device during a secretive collaboration with AT&T Mobility—Cingular Wireless at the time—at an estimated development cost of US$150 million over thirty months
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