South Korea’s top three telecommunication providers—SK Telecom, KT, and LG Uplus—have reported mixed financial outcomes for the third quarter. While varying year-over-year base effects created a stark contrast in operating profits across the firms, all three carriers successfully expanded their artificial intelligence (AI) and data center operations. Moving forward, industry watchers note that management faces the delicate task of balancing aggressive infrastructure spending with steady shareholder returns.

According to industry reports, the combined Q3 revenue for the trio reached approximately 15.48 trillion won, with operating profits totaling roughly 1.36 trillion won.

Profit Discrepancies Driven by Base Effects

The dramatic differences in earnings growth largely stemmed from comparisons to last year's unusual expenses. SK Telecom posted a massive multi-fold jump in operating profit, bouncing back from a weak third quarter last year that was impacted by financial hits and customer compensation following a USIM security incident. Similarly, LG Uplus experienced a sharp profit recovery compared to the previous year, when its earnings were weighed down by roughly 150 billion won in voluntary retirement expenses.

In contrast, KT experienced a decline in profitability. The company struggled with lower wireless revenues due to subscriber churn during fee-waiver periods and customer retention programs. Consequently, KT's net income dropped by 17.5%, whereas SK Telecom returned to a net profit and LG Uplus saw a multi-fold increase in net earnings.

Divergent Trends in Mobile Core Businesses

The mobile network sector also revealed contrasting trajectories. SK Telecom reported higher year-over-year mobile revenues primarily due to last year's low base, though its actual handset subscriber count ticked down slightly following administrative purges of long-term inactive accounts. KT similarly registered a minor decline in mobile service revenues and average revenue per user (ARPU).

On the other hand, LG Uplus stood out as the only carrier among the three to achieve a net quarterly increase in total mobile connections, driven by steady growth in both direct mobile and budget MVNO lines.

AI Infrastructure Fuels New Momentum

Despite differing core mobile performances, investments in AI and advanced data centers (AIDCs) paid off uniformly across all three telecommunication leaders.

SK Telecom expanded its AIDC and AI-driven business sectors, reporting steady revenue growth in both enterprise and consumer AI applications.
KT saw solid gains in its broader AI Transformation (AX) portfolio, supported by strong performance from its cloud subsidiary.
LG Uplus posted a substantial spike in AIDC revenues—surging over 27%—propelled by higher demand for facility colocation and customized design-build-operate services.

Balancing Capital Expenditure and Shareholder Value

As the race to dominate the AI infrastructure market accelerates, capital expenditures (CAPEX) have risen notably. LG Uplus ramped up its quarterly investments significantly to expand data center capacity, while SK Telecom and KT continued steady spending on data center subsidiaries and network upgrades.

To maintain investor confidence amid heavier spending, the telecom firms reaffirmed their commitment to shareholder returns. SK Telecom and KT maintained active quarterly dividend policies alongside share buyback programs, while LG Uplus continued executing its multi-year shareholder return roadmap—aiming to return a significant portion of its net income through dividends and treasury stock acquisitions.

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