In 2007, Apple Inc. introduced the original iPhone, one of the first mobile phones to use a multi-touch interface. The iPhone was notable for its use of a large touchscreen for direct finger input as its main means of interaction, instead of a stylus, keyboard, and/or keypad as typical for smartphones at the time. It initially lacked the capability to install native applications, meaning some did not regard it as a smartphone.[34] However in June 2007 Apple announced that the iPhone would support third-party "web 2.0 applications" running in its web browser that share the look and feel of the iPhone interface.[35] A process called jailbreaking emerged quickly to provide unofficial third-party native applications to replace the built-in functions (such as a GPS unit, kitchen timer, radio, map book, calendar, notepad, and many others).[36] In July 2008, Apple introduced its second generation iPhone with a much lower list price and 3G support. Simultaneously, the App Store was introduced which allowed any iPhone to install third party native applications (both free and paid) over a Wi-Fi or cellular network, without requiring a PC for installation. Applications could additionally be browsed through and downloaded directly via the iTunes software client. Featuring over 500 applications at launch,[37] the App Store was very popular,[38] and achieved over one billion downloads in the first year, and 15 billion by 2011.[39][40] In June 2010, Apple introduced iOS 4, which included APIs to allow third-par

y applications to multitask,[41] and the iPhone 4, with an improved display and back-facing camera, a front-facing camera for videoconferencing, and other improvements.[42] In early 2011 the iPhone 4 allowed the handset's 3G connection to be used as a wireless Wi-Fi hotspot.[43] The iPhone 4S was announced on October 4, 2011, improving upon the iPhone 4 with a dual core A5 processor, an 8 megapixel camera capable of recording 1080p video at 30 frames per second, World phone capability allowing it to work on both GSM & CDMA networks, and the Siri automated voice assistant.[44] On October 10, Apple announced that over one million iPhone 4Ss had been pre-ordered within the first 24 hours of it being on sale, beating the 600,000 device record set by the iPhone 4.[45][46] Along with the iPhone 4S Apple also released iOS 5 and iCloud, untethered device activation, backup, and synchronization,[47] along with additional features.[48] The iPhone (retroactively labeled the original iPhone, iPhone 1 or iPhone 2G) is a smartphone that was designed and marketed by Apple Inc. It is the first generation of iPhone and was announced on January 9, 2007[10] after months of rumors and speculation.[11] It was introduced in the United States on June 29, 2007. It featured quad-band GSM cellular connectivity with GPRS and EDGE support for data transfer. The device was succeeded by the iPhone 3G. The original iPhone no longer receives software updates from Apple; its final official firmware version was iPhone OS 3.1.3.