No, I don't have to enter a passcode. I used the built-in wizard for pairing. At one point it asked for a pin code and the text entry field already contained a four-digit numeric pin. I confirmed that, a window popped up on the treo, I entered that same pin there. There was an error message about some features not being supported by the phone. Nevertheless, dial-up worked fine after I selected my provider (t-mobile in germany). I'm using software 2.2005.45-7 (rd-enabled with flasher).

Reiner