There are many different types of business phone calls. Some are more common than others. A sales call is a phone call that you would typically have with a prospect in the sales process to learn about their needs and provide them with information about your product or service. These calls can also be for existing customers who may need help with a specific issue or question. An informational interview is a phone conversation where you, as the caller, want to gain information from an expert in the field so you can learn more about their research. In this type of conversation, it's typically not your goal to sell anything or close a sale. A customer service call is when someone contacts your company for assistance on an issue they have had with either your product or service in an attempt to get help or resolve a matter.