If after I tell them I am not interested, and they keep trying to make the sell, I use what I call the George Jefferson approach. Cellular phones are useful, but I wouldn't have one. I don't want to be disturbed while driving. I don't even like talking to someone who calls me from a cellular while they are driving. They fade in and out and have a tendency to give the traffic report.
Some telephone calls are great.
I always enjoy watching on TV the Superbowl champion getting a call from the President of the United States. The coach is talking to the President and at the same time a player is pouring champagne on his head. Alexander Graham Bell changed the way we live. Thanks to Alex, we can talk to anyone while doing anything. The billion dollar phone sex business proves that.