Nokia is the world's leading mobile phone manufacturer, its range of mobile phones are equipped with many services and software, so that users can experience music, navigation, video, television, video, games, business and many other functions. In addition, Nokia provides equipment, services and solutions for communications networks through Nokia Siemens Communications Technology Co., Ltd. As of December 31, 2007, the company has set up manufacturers of mobile terminals and network infrastructure around the world. The products are sold to more than 150 countries around the world and have a global network of sales, customer service and other operational departments. From January 1, 2004 to March 31, 2007, Nokia has four subordinate business groups: mobile phones, multimedia, enterprise solutions and Nokia Siemens Communications Technology. Support and services are provided by two parallel departments-consumer and market operations and technology platforms, in addition to a number of enterprise functions. On April 1, 2007, Nokia Network Operations and Siemens merged with the relevant departments of operators to form Nokia Siemens Communications Technology. Nokia's main competitors include Alcatel, Cisco, Huawei, Motorola, NEC, ZTE, IBM, LG, Samsung, Sony Ericsson, Apple, Google, Sony and other well-known enterprises. The company was founded in 1865 and is headquartered in Espoo, Finland.