Originally Posted by SoManyMiles-SoLittleTime
For what it's worth, Verizon CDMA phones support roaming in China and Taiwan. No SIM chip required. Your Verizon phone (perhaps others?) will work there (but call Verizon first). [NOTE that this is not their dual mode CDMA/GSM phone. This works with their CDMA phones.]
Additionally, HK now supports CDMA systems. Don't know about U.S. CDMA phones working there, however.
Unless your company is paying for your calls don't use Verizon. The costs are very, very high when compared to using a SIM card in a GSM phone or purchasing a pre-paid phone card to use with wired lines. See the vzw.com website for specifics.