Both, AT&T bought out Cingular.
ATT bought out Cingular.
Buy an unlock code from eBay for a few bucks.
I bought mine for about $100 plus the mail-in rebate at Cingular at&t Pretty good deal there.
you have to download the instant messanger. Or you have to have internet on your phone.
Cingular
40.00
Sorry I mean ATT wireless
On Cingular/ATT GSM it works just fine. No email though.
cingular
yes, but i wouldn't do that. It should work on any phone including t-mobile and att
Yes as long as the phone is att and has a sim card slot
No, the Blackberry Pearl isn't Wifi enabled.