So I want to buy the Samsung U900 off of ebay to replace my nasty Blackjack 2, and I wanted to know if anyone knew if it would work with Cingular/AT&T in the San Antonio, Texas area. I've bought a phone off ebay before (Samsung D900), loved it, but the service was real bad and internet didn't work, so I wanted to make sure this one would. Thanks for your help!