Customer Service Channels

  • Customer Service Center (For Mobile Services)
    • 1583  (Toll-free from a kt mobile phone) or (02) 2190-1180
    • Hours:  Monday – Friday (9:00 AM ~ 6:00 PM)
    • Languages:  English, Japanese, Mandarin Chinese, Korean
  • Customer Service Center (For Home Services)
    • 1588-8448
    • Hours:  Monday – Friday (9:00 AM ~ 6:00 PM)
    • Languages:  English, Korean

  • Emergency Contact
    • Please report a lost or stolen mobile phone through the following numbers a when the Customer Service Center is closed.
    • From within Korea:  (02) 2190-0901 (Korean-language support only)
    • From outside of Korea: +82-2-2190-0901 (Korean-language support only)
  • Expat Twitter     @olleh_expats
    • This is kt’s official Twitter account to stay in touch with our international customers. Follow us on Twitter to get the latest news and information from kt in real time.
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