Busan Transportation Corporation to upgrade train Wi-Fi to 5G, South Korea April 15, 2026 | Asia Pacific News, News Busan Transportation Corporation has partnered with LG Uplus to upgrade onboard Wi-Fi services on the Busan Metro from LTE to a 5G-based system. The initiative will use LG U+’s 3.5GHz 5G network as ba... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password