China Unicom or China United Netcom is a Chinese state-owned telecommunications operator in the People's Republic of China. Compared to other mobile providers China Unicom is ranked as the world's third-biggest mobile provider.
China Unicom was founded as a Government-owned corporation, established on July 19, 1994, by the Ministry of Information Industry and approved by the State Council.
Started as a wireless paging and GSM mobile operator, it currently provides a wide range of services including nationwide GSM mobile network, long-distance, local calling, data communication, Internet services and IP telephony in mainland China, and has operated a CDMA network in Macau since 18 October 2006. As of the end of April 2008, the company had 125 million GSM subscribers and 43 million CDMA subscribers. As of November 2008 the CDMA operations have been moved to China Telecom and UMTS (Universal Mobile Telecommunications System) has just launched in major cities across China on May 17, 2009.
In July 2009, China Unicom signed a $700 million deal with infrastructure vendor Ericsson to upgrade the company's GSM network.
In April 2012, China Unicom was a founding member in the formation of Cloud Computing Industry Alliance in Beijing. Other members of the alliance include Baidu, Tencent and Alibaba.