Mobile telephony industry at both national and international level is now one of the most dynamic and competitive industries. In Greek economy, the industry contributes 2.2% of GDP annually, serving about 10 million people. Customers’ satisfaction will be one of the key components for the industry development. The scope of this study is to evaluate through a conducted in Greece survey the user satisfaction from the three mobile phone firms, namely (osmote, Vodafone and Wind, which operate in Greece. The data analysis is based on the MUSA method. MUSA (Multicriteria Satisfaction Analysis) is an ordinal regression model which is based on the principles of multicriteria decision analysis. The provided results are able to evaluate quantitative global and partial satisfaction levels and to determine the weak and strong points of mobile operators.