SK Telecom is South Korea's largest wireless carrier, holding roughly 42% mobile subscriber market share with ~23.5M subscribers. The core business is selling postpaid monthly mobile subscriptions — bundled voice, text, and data — to Korean consumers and businesses, on tiered 5G plans. SK Telecom operates the country's largest mobile network and sells devices through company-owned stores, a network of exclusive dealers, and online channels. Revenue is driven by subscriber count and ARPU; SK Telecom has been actively migrating subscribers from LTE to 5G, which carries higher ARPU. The company also leases network capacity to 15 MVNOs. Through its subsidiary SK Broadband, SK Telecom offers fixed-line broadband (~7.2M subscribers), IPTV and cable TV (~9.4M combined), and fixed-line telephone. The fixed-line business bundles these services together, with ~87% of broadband subscribers on bundled packages. Beyond its core telecom business, SK Telecom is building out AI data centers through SK Broadband, targeting 300+ MW of capacity and ~Won 1T in annual revenue from that business by 2030. SK Telecom is also developing AI consumer and enterprise products, including "A.," a consumer AI agent with over 10M subscribers, and B2B AI tools. SK Telecom holds an equity stake in Anthropic and is part of a consortium developing a Korean-language sovereign AI model.