Nowadays customer experience is the most important factor affects the customer loyalty, especially in a mature market. Thus, a Complaint Process Platform (CPP) plays an important role in dealing with customer complaints; most of them are poor mobile coverage, frequent call drops and low speed on 4G. Usually, subscribes call service center directly and report issues to the agent. Many complaints can be resolved at this stage and no need to dispatch cases to the next level, a secondary agency that helps resolve complaints about telecom services. This paper introduces a method of kernel density estimation based on the locations of customer complaint by using kernel density function. This method targets hot zones with poor mobile coverage automatically and precisely and generates handling strategies, in order to improve the success rate of customer complaint handling at the service center. The process of designing the CPP metrics for telecommunication services is also given.