For those who may be interested, here are some early testing results of audio quality through the iPhone 4 in three different use models. In summary, handset performance is the most improved for both incoming and outgoing audio, with headphone port performance only modestly different, while speakerphone performance is better for the iPhone 4 user, but not as much to the person on the other side of the call. Handset Performance. The most noticeable…
