How does this work with smartinmate? I can't figure it out

This service works with SmartInmate by using a rate comparison algorithm that analyzes various phone number options to find the best per-minute rate for the customer. The SmartInmate Rate Calculator helps identify numbers that can lower call costs significantly. While switching to a different number usually results in reduced rates, there are instances where no savings are available. In such cases, a refund is provided to ensure customer satisfaction.