Due to the constant evolution of and the competitiveness of telecommunication market，leaders must establish the adequate strategy to preserve their customers. This challenge has increasingly big importance，because the demand of consumers and customers became high. They are more informed，educated and theyare looking for more genius services to meet their needs and exceed their expectations.　　This research focuses on the analysis customer loyalty in telecommunication sector in TOGO. The main objective of this study is tounderstand and find components that influence customer loyalty of in service sector.　　The study was conducted with students of University of Lome and the employees of Campus Hospital. Data collection was conducted from 10th to 18th June 2014. We made a set of 150 questionnaires；finally 138 respondents completed the survey.　　The results of this study show that various components can influence on custom erloyalty. These variables are related to each other. Indeed, we can say values，trust, commitment，complaint handling and empathy. Without this path，we cannot achieve a degree of loyalty.Our analysis shows the similarities between the various customers and their contributions to the studied company.