CITIC Telecom International Holdings Limited, an investment holding company, engages in the provision of international telecommunications services in Hong Kong, China, Macau, Singapore, and internationally. It provides international voice services; SMS services, such as A2P, P2P, and inter operator SMS; mobile value-added services that include mobile roaming signalling, SIMN, prepaid roaming SIM, MVNE, GMVNO, USSD, IPX, and SMS firewall services; datamall; internet; internet of the things; global mobile number smart authentication services; and cross border 5G SD WAN services. The company also offers TrueCONNECT private network solutions, TrustCSI information security services, SmartCLOUD cloud computing solutions, DataHOUSE cloud data center, ICT-MiiND intelligent solutions, internet services, and managed services; cloud exchange solutions; and technology support services. Additionally, it provides CloudSMS, enterprise cloud communication solutions, commercial broadband, corporate designated email services; private network solutions, EPL, SD-WAN, internet access, cloud computing, information security, cloud data centre and a series of value-added services, mobile roaming, voice, messaging, data, and value-added telecommunications services to mobile, fixed line, virtual network, and over-the-top operators. Further, the company offer property and equipment holding services. CITIC Telecom International Holdings Limited was formerly known as CITIC 1616 Holdings Limited and changed its name to CITIC Telecom International Holdings Limited in November 2010. The company was incorporated in 1997 and is headquartered in Kwai Chung, Hong Kong.