Over the last two decades mobile communications industry is considered as one of most important and rapidly growing sectors of the economy around the world. In Greece the mobile communications sector is considered as one of the most importantly developed sectors of the economy. At the end of 2018, the Industry turnover reached at 4.8 billion euros, while its contribution to Greece’s Gross Domestic Product (GDP) was 2.6%, showing a decreasing trend comparing to 2017. Customers’ satisfaction is one of the key components for the industrial development. Many researchers argue that there is a strong, positive relationship between customer satisfaction and business performance. The aim of this study is to examine the relationship between customers’ satisfaction from the three larger mobile companies participated in Greece (Cosmote, Vodafone and Wind) and the business performance of these companies. The reported customers’’satisfaction was analyzed with the Multicriteria Satisfaction Analysis (MUSA) method, which is considered as an aggregation–disaggregation approach developed on the qualitative analysis regression. The implementation of this survey was structured through the development of a web site questionnaire, addressing customers’ satisfaction of the aforementioned three mobile telecommunications companies. Comparable analysis of the relationship between business performance and customers’ satisfaction, it was deployed by using regression models and correlation coefficients. The research findings unveiled that customers’ satisfaction and business performance are positively related.