I'm talking about a very specific thing with voice quality, which is how the phone handles background noise in a noisy setting on outgoing audio.

My experience is that Nokai N series phones have very good voice quality in terms of audio quality in the earpiece and quality of the reproduction of my voice from the microphone.

But in noisy settings Nokia has really bad noise cancellation. Its microphones pick up the background noise and overamplify it, so that my callers hear all kinds of clatter behind my voice.

So I'd say go out and test your phone in a noisy restaurant or cafe and see what your caller says. I've seen people report in other forums that the N900 is just as bad as every other N series phone in this respect. I think when people say voice quality is good for them on the N900, they're not talking about the specific situation that I'm addressing.