Make it a two way conversation
Even psychologists say that the best productive conversation is a two way conversation. So when you pick up phone for calling your prospective client, remind yourself that you are going to give equal opportunity to your listener to contribute to the conversation.
Instead of guiding the conversation, let your perspective client steer the conversation. This is how you can win the trust of the person on the other side of phone.
Do not push
Most salesman in their desperation to sell, often become aggressive and push the prospective client for taking a decision. A better approach can be to guide them to the solution and let them be the decisive figure. Provide them with an option to choose your service or find an alternative himself.
The moment you suggest your service as a solution when the conversation it still premature, your prospective client will sense your hidden desire to sell and may drift away. Instead of proposing them that your service is the best solution to their problem just tell them the properties of your service and leave it onto them to decide. The lesser desperation you show the better it will be for your sales.
Salesmanship is like an art. The more you excel in it the greater will be your success. You can learn more about this from unlock the game script. It has comprehensive step by step description of how to persuade a pr3ospective client into buying your product.