Chunghwa Telecom Co Ltd (Chunghwa) provides integrated telecommunications services. The company offers a range of services including mobile, fixed-line, and ICT services. Its services portfolio comprises local and long-distance networks, leased lines, fiber optics, intelligent networks, multimedia-on-demand, business customer services, internet access, and data communications.

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Chunghwa focuses on research and development in areas such as innovative Information and Communication Technology (ICT) services, advanced cloud-network integration technologies, and energy-saving technologies. Key initiatives include AIoT solutions for traffic management and smart ports, metaverse platforms, AI-powered cybersecurity, and advanced cloud computing technologies. The company is also working on energy-saving solutions for data centers and networks. As of December 2025, Chunghwa applied for 161 patents and obtained 148 patents, receiving 25 major awards in Taiwan and internationally. Chunghwa has established the Kaohsiung R&D Center of Telecommunication Laboratories and the Kaohsiung Technology Center of Information Technology Group. These units focus on the development of AI, information security, cloud services, AIoT, and other related enterprise application services, contributing to the company's R&D and technology development in the southern region and creating employment opportunities. In FY2025, the company incurred an expense of TWD4,336.4 million on its R&D activities, which grew 5.1%YoY and stood at 1.8% of the company’s total revenue.