I bought my Nexus S from Best Buy, no contract or anything to sign except the receipt. I don't even have a plan with T-Mobile; I use a local carrier that runs

I bought my Nexus S from Best Buy, no contract or anything to sign except the receipt. I don't even have a plan with T-Mobile; I use a local carrier that runs on T-Mobile's frequencies. I paid retail price ($529+tax), and walked out of the store in less than 10 minutes.