Interesting. This is on your HD2, I presume? I don't know the phone, but you won't be getting any AT&T 3G with a T-Mobile phone, due to the different 3G band assignments (at least until any completed merger, with a different phone). I wonder if I was a postpaid user whether mine would switchover automatically as well. It's either that or just the particular area I'm in, I suppose. Wasn't a factor with Centennial.