The South Korean network renting CDMA handsets that will accept GSM SIM's is SK Telecom. More info on that here:

http://www.sktelecom.co.kr/english/products_services/roaming_service/inbound_ro aming/index.html

Last I looked I think T-Mobile US was CLOSE to having a roaming agreement

BTW: No Japanese WCDMA network is yet offering a multinetwork phone for inbound roaming customers, so your choices are to rent a PHS phone, WCDMA (DoCoMo FOMA) or a CDMA2000 phone from J-Phone

Also SK Telecom does allow CDMA roaming handsets on to their system. Both China Unicom CDMA and Hutchison CDMA (HK) work fine. Some S. American CDMA networks appear to work as well.

[This message has been edited by NickP 1K (edited 05-20-2003).]