>>17261052You have a few options.
The iPhone 5 is coming out this fall.
Samsung Galaxy S II is coming out this summer, with quad band GSM, so you'll be able to use it on AT&T. Whether it will be offered by them is another question.
The best android phones out now for AT&T are the Atrix, and the Inspire.
My brother has the inspire, and it is a nice phone. Smooth, great great camera (8mp), and a 4.3in screen. Thin too. And only $99.