Nokia 6310i GSM ok on Cingular?

I have a Nokia 6310 TDMA phone on AT&T with an expensive CARK-91 hands free
system nicely integrated into my car.

It looks like I have to change phones (and plans) as TDMA gets removed from
the network.

1) I am looking for feedback on how well the Nokia 6310i GSM phone runs on
Cingular?
I am in the Western PA region.

2) The 6310i will still be compatible with the car kit, I would buy an
unlocked phone on eBay.
Can I expect any problems running an unlocked GSM phone on Cingular?

Thanks for any help

In article <4bWdnQKN0s-b7rTYnZ2dnUVZ_o-dnZ2d@comcast.com>,
JCorsica <jcorsica@hotmail.com> wrote:
>I have a Nokia 6310 TDMA phone on AT&T with an expensive CARK-91 hands free
>system nicely integrated into my car.
>
>It looks like I have to change phones (and plans) as TDMA gets removed from
>the network.
>
>1) I am looking for feedback on how well the Nokia 6310i GSM phone runs on
>Cingular?
>I am in the Western PA region.
>
>2) The 6310i will still be compatible with the car kit, I would buy an
>unlocked phone on eBay.
>Can I expect any problems running an unlocked GSM phone on Cingular?

Only if, like the 6310i, it omits the GSM850 band which is used for a
significant - and growing - portion of Cingular's coverage area.