i am still looking for a good phone. now i just tried my friends siemans 56 to try out my new 430. it work fine. unfortunately the telephone use is restricted by limiting use while driving. not being voice activated for dialing while driving really limits the phone's usefulness. 18 1 touchs is not enough. also you cannot dial extensions after you connect.
by the way, i also need both bluetooth & a built in speaker. i have a motorola 400(not bluetooth) but the speaker has a glitch. when the call connects there is a 1 or 2 second delay until you can activate the speaker so you hear your party so you can respond. often before you can respond the party often hangs up. I checked the 600 & it has the same flaw. i am waitng until some new nokia bluetooths are available.
good luck
ray1989
bxabe-mail@yahoo.com