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CITIC Telecom International Holdings Limited, an investment holding company, engages in the provision of international telecommunications services worldwide. It provides carrier services, such as mobile, roaming, voice, messaging, data, and value-added telecommunications services, as well as eSIMs, DataMall platform, and home audio visual entertainment and e-commerce service through set-top boxes to global carriers, including mobile, fixed line, virtual network, and internet and OTT operators. The company also offers enterprise solutions, including virtual private network connectivity, data center, cloud computing, information security, enterprise mobile services, and voice and information services; and Internet-based communication services.