I only use the airphones if I need to get my company or home in an emergency and if I can get some bonus points. Quality is good, but so expensive.
The best place to make a phone call is a pay phone. Even better if you have a pre=paid phone card that earns you miles when you charge it. I have one with United where I charge 50 bucks every month or so and get 500 miles. The card's great because if anyone should get my phone card number I only use a few bucks and don't end up getting charged to calls to Saudi arabia, Beijing, Mecca and Houston! CATMAN