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Customer Support
Customer Support
Reach the right ONE4U team via the channels below.
Hospital Installation
070·7331·6212
Free installation consultation for hospital smart payphones
General Customer Center
02·569·1414
Service, technical support, and other inquiries
Business Hours
Weekdays 08:30 — 17:30 KST
(Lunch 12:00 — 13:00, closed weekends and Korean holidays)
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