Listen to this. T-Mobile just beat every other U.S. carrier bringing HD Voice to market, delivering a radical improvement in call quality for everyone carrying an HTC One S, Samsung Galaxy S III, or Nokia Astound phone. And wait, it gets better—it might work with iPhones. “It’s a very noticeable enhancement to the voice call,” said Neville Ray, T-Mobile’s CTO. He’s right. T-Mobile gave me a quick demo of the new system, and it’s definitely an improvement. The demo compared two calls from a noisy coffee-shop-like location. In the HD Voice call, the background noise receded, although it didn’t vanish. Very noticeably, though, the caller’s voice really jumped forward, and the caller’s tone became much richer and more well-rounded. Comparing it in my memory to AT&T’s HD Voice demo from yesterday, AT&T’s demo sounded even better in terms of noise cancellation. Of course, AT&T isn’t going to have HD Voice for at least eight more months, and neither demo was an actual live call.