Group items tagged

CDMA networks in Korea, Guam, Saipan, Thailand, China, Hong Kong, America, Australia, New Zealand and Canada. Out of these, data transfer is only possible in Korea.

GSM - which exists in over 200 countries (including major destinations in Europe, Africa and Asia Pacific). Within these countries, GSM uses four different frequencies - 850, 900, 1800 and 1900MHz.