The increasing number of M-internet subscribers and the fast growing revenue originated from this service indicate the great potential of Mobile internet, establishing it as a promising business opportunity in Brazil. This paper’s goal is to study and understand the main perceptions and factors that promote the use of Mobile internet among young consumers in Brazil. To achieve this objective, an adjusted version of the Technology Acceptance Model (TAM) is employed, with the addition of five other constructs deemed influential to consumers’ Mobile internet acceptance. To test the proposed relationships and hypotheses, a survey was performed resulting in a sample of 305 valid responses. The results were analyzed through structural equations modeling (SEM) and confirmed most of the research hypotheses. Among the most relevant findings is that Attitude toward Mobile internet is the most significant factor in predicting behavioral intention to use Mobile internet. Furthermore, attitude was notably more influenced by perceived usefulness, rather than perceived playfulness and perceived ease of use.