The iPhone is an internet-connected smartphone designed by Apple Inc. featuring a touchscreen interface without physical buttons. It functions as a camera, portable media player, and provides services like email, web browsing, and WiFi connectivity. The original iPhone was released in 2007 and sold over 8 million units that year in the US and select other countries. It has a liquid crystal touchscreen, audio capabilities, internal storage options of 4GB or 8GB, and applications for photos, calendar, maps and more that can be updated through iTunes.