Just bought the K750i from ebay. Cheaper than local store or service provider. Hence I caution you. Cingular is not very receptive to K750i since it does not have much on it to begin. Although you can as I have get a sim card from cingular and buy the phone from ebay unlocked so if you are not satisfied with cingular you can get another carrier sim chip and just install it to the phone. buying direct from Cingular Carrier will limit you ability to change SIM CARD carriers and cost more for the phone. I paid 190 for the phone. At the store it sold for 350.00, You do the math. Also when purchasing the K750i for use with cingular there will be some problems initially but the K750i web site has been very helpful so far. Good Luck