If you are on the road a lot and need to talk to several clients or vendors at once, consider using the conference call services of a third party provider. This service will enable you to use your cell phone rather than be in your office to make the call. You also won't have to try to coordinate the conference call through your cell phone. Determine the number of conference calls that you make each month and project the amount of minutes you will use in the future. Sign a contract with the provider that offers the best value.