<p>In highly saturated mobile telecommunications markets, customer retention remains a strategic priority for operators. This study examines the determinants of consumer satisfaction and loyalty in the Czech mobile telecommunications market, a mature and highly competitive environment with 15.7 million active SIM cards dominated by three major operators. Using Structural Equation Modelling (SEM), the study analyses survey data from 1000 respondents quota-matched to the population with respect to age, gender and mobile operators market share, the study tests a model comprising five satisfaction drivers and three loyalty antecedents. The findings identify transparent communication regarding tariffs and special offers as the strongest determinant of satisfaction, followed by technical service quality and perceived price adequacy, while customer care and billing clarity exert comparatively weaker effects. Loyalty is primarily driven by overall satisfaction and switching barriers, whereas competitors’ attractiveness does not significantly influence loyalty in the Czech market context. The proposed model demonstrates strong explanatory power, explaining 82% of the variance in satisfaction and 87% of the variance in loyalty. This study contributes to telecommunications marketing research by highlighting the role of information exposure as a distinct satisfaction driver and provides managerial implications for reducing customer churn in mature mobile markets.</p>