China Mobile and its subsidiaries are engaged in the provision of mobile telecommunications and related services principally using the Global System for Mobile Communications standard and the Time Division Synchronous Code Division Multiple Access standard. In addition, Co. provides its customers with internet access through wireless local area networks. Co. also develops and carries its 4G business based on the TDD mode long-term evolution technology. As of Dec 31 2013, Co. had approx. 767,200,000 customers in all 31 provinces, autonomous regions and directly-administered municipalities in the People's Republic of China as well as in Hong Kong.

China Telecom is a full services integrated information service operator and wireline telecommunications and broadband services provider in the People's Republic of China. Co. offers wireline and mobile telecommunications services including wireline voice, mobile voice, internet, managed data and leased line, value-added telecommunications services, integrated information application services and other related services. As of Dec 31 2010, Co. had wireline access lines in service of approximately 175 million, wireline broadband subscribers of approximately 63 million and mobile subscribers of approximately 90 million.

China Unicom (Hong Kong) is an investment holding company. Through its subsidiaries, Co. is a telecommunications operator in China. Co. is engaged in providing mobile voice, fixed-line voice, fixed-line broadband, data communications and other telecommunications services to its customers.Co. is engaged in the provision of cellular and fixed-line voice and related value-added services, broadband and other Internet-related services, information communications technology services, and business and data communications services. The GSM cellular voice, WCDMA cellular voice, TD-LTE cellular voice, LTE FDD cellular voice and related value-added services are referred to as the .mobile business.