Nokia Navigator 6110 Singapore

Can Singapore handphones w networks (Quadband GSM or WCDMA) be used in U.S?

Hi…m going to buy a handphone for use in US. But not sure whether will be able to with the Quadband phones we have now. M thinking of Nokia N95, 6500, and 6110 navigator. Any advice?
Thank you!
Wat abt triband ones?

Quadband GSM phones will work. If you’re getting WCDMA, I’d make sure it is designed for the US, (1900/850).