ONE4U Co., Ltd. is a South Korea-based information and communications technology (ICT) and artificial intelligence (AI) solutions provider specializing in specialized non-face-to-face telecommunications services and smart communication platforms. Founded in April 1998 and headquartered in Seoul, South Korea, the company develops, manufactures, and deploys intelligent communication systems tailored for restricted and regulated environments, including military installations, correctional institutions, law enforcement agencies, specialized medical facilities, and boarding schools. The company operates through key business segments comprising specialized telecommunication services, institutional video visitation, biometric recognition solutions, and industrial AI analytics. Its core products and services include the Greenbee (GrinBi) integrated communications platform, providing smart multimedia public payphones, video calling, voice telephony, and dedicated mobile messaging applications for military personnel and specialized institutional users; the Smart Video Visitation System, enabling secure non-face-to-face remote family visitation for correctional facilities and juvenile centers; GrinFace, a proprietary AI facial recognition engine certified for biometrics authentication, identity verification, and access control; interactive smart payphone kiosks and communication terminal hardware; mobile-based digital advertising and membership services; and an AI process anomaly detection and equipment predictive maintenance platform that utilizes patented integrated multi-sensor technologies to monitor vibration, electrical current, and temperature in real time across precision manufacturing facilities. In recent strategic developments, ONE4U Co., Ltd. approved the statutory absorption merger of Greenbee Partners Co., Ltd., its affiliated developer and manufacturer of telecommunications equipment and operational systems, to streamline organizational efficiency and consolidate end-to-end service capabilities. In addition, the company has broadened its technology footprint by launching its proprietary sensor-integrated AI predictive maintenance solution for high-precision manufacturing sectors and expanding the commercial integration of its GrinFace AI biometric technology across public-sector and enterprise communication networks.