China Mobile Limited is an investment holding company. The Company is engaged in providing mobile telecommunications and related services in 31 provinces, autonomous regions and directly-administered municipalities in Mainland China and Hong Kong Special Administrative Region through its subsidiaries. As of December 31, 2014, the Company's customer base was 806.6 million. As of December 31, 2014, its fourth generation (4G) customer base was 90.1 million. The Company's business is divided into voice services and data services. The Company's customer service hotline offers assistance on different mobile service difficulties, handles all enquires and subscription of a range of mobile phone services. Its voice services include the business where its customers make and receive calls with a mobile phone at its mobile telecommunications networks. Its data services include Short Message Services and Multimedia Messaging Service, Wireless Data Traffic, Applications and Information Services.