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Over-The-Top (OTT) Instant Messaging (IM) Service Loyalty from the Perspective of Vietnamese User


  • Graduate School of Dongguk University, 38066, Korea, Republic of
  • Department of Business Administration, Dongguk University, 38066, Korea, Republic of


Objectives: This paper aims to examine the market of Over-The-Top (OTT) Instant Messaging (IM) service in Vietnam, particularly the user loyalty to an OTT IM service. Methods/Statistical Analysis: To that end, the study theoretically bases on the information systems (IS) success model and Expectation-Confirmation Model (ECM) with a slight adjustment to be appropriate with Vietnamese market context. Empirical research is adapted as a method to study the above objectives. Sample size is 224 respondents collected from Vietnamese OTT IM users. Smart PLS 3 software tool is employed for the statistical analysis of data. Findings: The study well explains “user loyalty” concept for OTT IM service, Vietnam market in particular. It statistically interprets more than 70% of user satisfaction, user continuance intention and user recommendation intention. However, the study could not explain that concept completely. For instance, user intercross use and user price endurance have a low explanation power which is under 40%. There are still other factors influencing on user loyalty that need to be deeply studied further. Moreover, the study has showed that system quality of OTT IM service plays an important role in contributing to user positive perception about Perceived Usefulness (PU) and confirmation. Then, PU and confirmation positively affect to user satisfaction and user loyalty. These findings related to PU, confirmation and satisfaction are quite similar to the previous studies; while the findings related to user loyalty are the new values of this research. Improvements/Applications: The results provide some helpful insights and valuable practices to both domestic and foreign OTT IM service providers for their business in Vietnamese market which is still new and open-ended.


Instant Messaging (IM), Loyalty, Over-The-Top (OTT), Vietnam Market, Vietnamese Users.

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