well Cleo, if you want, buy it, and I'll put my sim card in it and you can see how it works.
In fact, I'll give it a good home until you switch to Cingular.
Also note that the first version doesn't support 3g, so, even though Cingular has a 3g/edge network, that phone can't support it.
Also, Cingular is a little like AT&T and refuses to turn on certain features on their phones -- even though the phones can support it. My older nokia had an IRDA modem -- my laptop could connect to it, it could dial the number, but, as soon as it realized it was a data call, the phone would immediately disconnect. I was willing to pay for the airtime and it took about 3 weeks for Cingular to finally admit that while the phone was capable, and their network was capable, they turned off that feature and weren't going to enable it.