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1B, South Sea Mansion, 81 Chatham Road South, Tsimshatsui, Kowloon, Hong Kong. Phone : +852-2376-2371 Fax : +852-2375-1333 Dial-up : +852-3001-8200 E-mail : info@iohk.com

General Enquiry Phone No. : +852-2376-2371 (09:00 to 18:00 Monday to Friday) Fax No. : +852-2375-1333 E-mail : info@iohk.com Payment Enquiry Phone No. : +852-2376-2371 (09:00 to 18:00 Monday to Friday) Fax No. : +852-2375-1333 E-mail : acct@iohk.com Technical Support Phone No. : +852-2376-2371 (09:00 to 18:00 Monday to Friday) Fax No. : +852-2375-1333 Web Page : Data Sheets, FAQs E-mail : help@iohk.com System Enquiry Phone No. : +852-2376-2371 (09:00 to 18:00 Monday to Friday) Fax No. : +852-2375-1333 E-mail : admin@iohk.com Roaming Service Phone No. : +852-2376-2371 (09:00 to 18:00 Monday to Friday) Fax No. : +852-2375-1333 Web Page : http://www.iohk.com/Roaming E-mail : roaming@iohk.com