The traditional concept of cost savings evolved in the manufacturing industry where savings tend to be achieved by applying various lean tools. During the last decade, the concept of cost savings has not been confined to the manufacturing industry. Lean methods are now being applied in service industries, and many organizations are benefitting from this. Lean even can be applied in call centers, and many call centers have begun reaping the rewards of applying these methods. The author work for a leading mobile phone operator in Bangladesh, and he applied lean in its call center. Considering the benefits of applying lean in a call center they initiated a lean Six Sigma project. After implementing the solutions, within three months, the average call handling time has been reduced to 120 seconds from a previous 150 seconds. Consequentially, the interactive voice response call waiting time was reduced, and the call center can now receive 20% more calls with the same resources.