For a brief moment during yesterday’s keynote, Apple mentioned that along with some new LTE and battery wizardry, they were able to add support for “wideband audio” phone calls. Some tech people are calling it HD Voice, because it’s really just higher quality voicecalls.
The iPhone 5 supports HD Voice, but you’re never going to be able to use it in the U.S. right now, and you probably never will. Why? Well, there are a lot of messy technical details behind it, but here’s the simplest explanation.