I'm thinking about buying a Nokia E70 to use with my Cingular account.

I'm worried about using the European version which only has GSM 900, 1800, 1900. I know in some parts of the country Cingular uses GSM 850. I primarily use my phone in SF, LA, and NYC.

Does anyone have a similar situation that can comment? Will my Cingular phone still work in the US??

Thanks