China Mobile Limited is an investment holding company. The Company and its subsidiaries provide mobile telecommunications and related services in 31 provinces, autonomous regions and directly-administered municipalities in Mainland China and Hong Kong. As of December 31, 2012, its total customer reached 710 million. The Company's products and services include voice services, which refers to the business where customers make and receive calls with a mobile phone at any point within the coverage of the Company's mobile telecommunications networks; data services, which comprise short message service and multimedia messaging service (SMS & MMS), wireless data traffic, and applications and information services. As of December 31, 2012, the Company's ultimate holding entity was China Mobile Communications Corporation (CMCC). As of the same date, its subsidiaries included China Mobile Communication (BVI) Limited, China Mobile Communication Co., Ltd. (CMC) and Guangdong Mobile, among others.