T-Mobile is now the only American carrier without the iPhone, and it's betting the farm on Android — a platform where Samsung's devices have typically been the cream of the crop. The $229.99 Galaxy S II (with a two-year contract, of course) is a natural upgrade to its top-notch, huge-selling predecessor — it’s got a bigger screen, and beefier internals — but is it enough of a step up? We had high hopes for this phone, since we've already reviewed one Galaxy S II variant, the Epic 4G Touch for Sprint, and other than a few caveats found it an excellent handset. Can it live up to its namesake, and more importantly, can it keep up with the rest of the high-end phone market? Read on for our full review.