SK Telecom Co Ltd (SK Telecom) is a wireless telecommunications services provider. Its primary activities include providing wireless and fixed-line telecommunications services. SK Telecom also offers a broad range of complementary services and solutions, including IoT solutions, enterprise communications services, cloud services, subscription services, advertising, curated shopping services, AI business-to-consumer (B2C) services, and AI business-to-business (B2B) services.

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SK Telecom focuses its research and development initiatives on developing new wireless technologies and services, particularly for its 5G and LTE networks. The company is also working on value-added technologies and services, such as wireless data communications, and is exploring the convergence between telecommunications and other industries, including AI, big data analytics, and media. The company maintains a high level of spending on R&D and collaborates with Korean research institutes and educational organizations. Additionally, SK Telecom is involved in strategic alliances with domestic and foreign companies to exchange or jointly develop technologies, products, and services. The R&D units of SK Telecom include the SK AI Research and Development Center, which is subdivided into the Future Research and Development Laboratory, AI DC Laboratory, Open AIX Laboratory, Vision Laboratory, Media Laboratory, Digital Twin Laboratory, and the AI Model Laboratory. The Infrastructure Technology Division of the Network Infrastructure Center also conducts related R&D activities. Each business unit has its own research team for specific short-term research needs, and some consolidated subsidiaries have their own R&D organizations for activities related to their respective business areas. These units and teams focus on long-term, technology-intensive research projects. In FY2025, the company incurred expenses of KRW339,507 million, which decreased 10.2% from FY2024.