I think the cell phone thing is a huge issue in alot of relationships. I know it got to be a problem with me & H when he was still living at home because he would go outside in the garage & talk to whoever. His friends had that number but never called the house.
I always had the same problem - he never felt like talking to me on the phone (still doesn't) but whenever I am w/ him it rings constantly & he talks on it alot to everyone else.