when did the first mobile phone came out
History of mobile phones The Second World War made military use of radio telephony links. Hand-held radio transceivers have been available since the 1940s. Mobile telephones for automobiles became available from some telephone companies in the 1940s. Early devices were bulky, consumed high power, and the network supported only a few simultaneous conversations. Modern cellular networks allow automatic and pervasive use of mobile phones for voice and data communications.
History of mobile phones In December 1947, Douglas H. Ring and W. Rae Young, Bell Labs engineers, proposed hexagonal cells for mobile phones in vehicles.[17]  At this stage, the technology to implement these ideas did not exist, nor had the frequencies been allocated. Two decades would pass before Richard H. Frenkiel, Joel S. Engel and Philip T. Porter of Bell Labs expanded the early proposals into a much more detailed system plan. It was Porter who first proposed that the cell towers use the now-familiar directional antennas to reduce interference and increase channel reuse (see picture at right)[18] Porter also invented the dial-then-send method used by all cell phones to reduce wasted channel time.
Smartphone In 1999, the Japanese firm NTT DoCoMo released the first smartphones to achieve mass adoption within a country.[1] Smartphones became widespread in the late 2000s, following the release of the iPhone. Most of those produced from 2012 onward have high-speed mobile broadband 4G LTE, motion sensors, and mobile payment features. In the third quarter of 2012, one billion smartphones were in use worldwide.[2] Global smartphone sales surpassed the sales figures for feature phones in early 2013.[3]
Smartphone In early 2007, Apple Inc. introduced the iPhone, the first smartphone to use a capacitive multi-touch interface.[25] (A year prior the LG Prada was the first mobile phone released with a large capacitive touchscreen,[26] but it was not a smartphone, and its screen was not multi-touch.) The iPhone was notable for abandoning the use of a stylus, keyboard, or keypad typical for smartphones at the time, in favor of a large touchscreen for direct finger input as its main means of interaction. Though one columnist described the initial iPhone as "not a smartphone by conventional terms, being that a smartphone is a platform device that allows software to be installed,"[27] the opening of Apple's App Store a year later not only satisfied this requirement, but it became the new main paradigm for smartphone software distribution and installation.