In today’s keynote, Apple has announced that the new iPhone 5 supports wideband audio or HD voice which means higher-fidelity call quality.
HD voice has been around for many years nut the lack of supported devices has prevented it for taking off. The iPhone 5 might just be that first step to widespread acceptance
The company says that it’s got 20 carrier partners ready to deliver HD voice at device launch, thought it hasn’t named them.