SK Telecom Co. Ltd. filed a 6-K report detailing its 'Annual Report 2023' concerning corporate sustainability efforts, approved by its board in June 2024, covering financial performance and non-financial information for the period of January 1 to December 31, 2023. The report is focused on operations primarily in South Korea, generating over 99% of revenue there, with quantitative data presented for the years ended December 31, 2021, 2022, and 2023.