I do not understand the stigma associated with talking on the phone. Having some time discipling into when you take/return calls is no different than taking an organized approach to email.

Personally I find that calling is like a superpower in business. If you want better rates, better service, and better options you are almost always better of calling rather than relying any other means.

Nobody really calls me anymore. Even my wife knows I'm more likely to reply to her email than pickup the phone ;)