Telecom Service One Holdings Limited is an investment holding company that provides repair and refurbishment services for mobile phones and other consumer electronic devices in Hong Kong. It also sells related accessories, offers supportive services, and engages in property investment. The company serves corporate clients, telecommunications service providers, and international service companies. Founded in 1987, it is headquartered in Kowloon Bay, Hong Kong, and operates as a subsidiary of East-Asia Pacific Limited.