my wife has an N 6230, I have an SE T610, which is quite similar to the Z600. Here´s´what I´ve found: The N6230 accepts vcard, vcal info over bluetooth, thus you can transfer address and calendar data, but isync doesn´t work. Modem etc works fine, though. And despite the smaller display you actually get more lines of text using wap for example, as the UI isn´t as bloated. The font is smaller, though. The camera of the 6230 is vastly superior, my T610´s is totally useless, and I´ve understood that the z600 camera is about the same. Anders