.. How do I get into Dagny's cell phone?

There's a piece of paper somewhere around that told what Dagny's password was. Have you seen it?

If not, go to the ship and go down into the hold.

Ship's Hold

If you've forgotten the word, look at the piece of paper in your inventory called "Dagny's Note." It tells you that the password is --

-- SCUTTLEBUTT. But this won't work until you go into the hold and get that paper.