Yes, your group will enjoy continuous, high-speed internet on South Korea's world-class infrastructure with Triply! You'll maintain a strong 4G/5G signal even while traveling inside the Seoul and Busan subway systems (including stations and tunnels) and on the KTX (high-speed train) as it glides between cities. This exceptional connectivity means your crew can stay entertained, share updates, and coordinate plans effortlessly, whether you're commuting across Seoul or embarking on a cross-country adventure.
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Will my group have internet coverage on the KTX (High-Speed Train) and in the Seoul Subway with Triply?
Updated April 22, 2026
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