I just upgraded my iPhone 5 to IOS 7 and....the voice quality is much better. 
I went through three iPhone 5s since its launch and voice quality has really been a problem in all of them. I use for my phone for business and it has been a real drag listening to people complain about lack of clarity, static, fading, etc.
Much better now.
Thanks Apple
PS - BUT, new color palette not so good. These are the colors used for infants. The beautiful iPhone now looks like a bloody toy...
I went through three iPhone 5s since its launch and voice quality has really been a problem in all of them. I use for my phone for business and it has been a real drag listening to people complain about lack of clarity, static, fading, etc.
Much better now.
Thanks Apple
PS - BUT, new color palette not so good. These are the colors used for infants. The beautiful iPhone now looks like a bloody toy...