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